1. A method of indicating timing parameters and an identity of a particular cell group from a number, M, of possible cell groups in a signal transmitted in a cellular communication system that employs a radio frame in a physical layer, the radio frame comprising a number of time slots, the method comprising: transmitting, in a known one of the time slots of the radio frame, a synchronization signal, Si, that comprises a pair of sequences, S1, Sj arranged in a first ordering; and transmitting, in another known one of the time slots of the radio frame, a synchronization signal, S2, that comprises the pair of sequences, S1, Sj arranged in a second ordering, wherein: each member of the pair of sequences, S,,Sj , is selected from a group', 'comprising at least NSeq = ceil different sequences; the selected pair of sequences is uniquely identified with the particular cell group, wherein ije. l,...,NSeq and S1 âx89xa0 Sj ; and the first ordering of the sequences is used only for transmission in the known one of the time slots of the radio frame, and the second ordering of the sequences is used only for transmission in said another known one of the time slots.

2. The method of claim 1 , wherein: the first ordering of the pair of sequences, S1, Sj is effected by', 'transmitting the sequence S1 before transmitting the sequence S; ; and', 'the second ordering of the pair of sequences, S1, Sj is effected by', 'transmitting the sequence S; before transmitting the sequence S1.

3. The method of claim 2, wherein S1 and S2 are each of length n, and each of the sequences S15S7 is of length nil.

4. The method of claim 1 , wherein: the physical layer of the cellular communication system employs', 'Orthogonal Frequency Division Multiplexing; the first ordering of the pair of sequences, S15S7 is effected by', 'transmitting the sequence S1 on a first set of one or more sub-carriers, and transmitting the sequence S7 on a second set of one or more sub-carriers; and', 'the second ordering of the pair of sequences, S; , S7 is effected by', 'transmitting the sequence S7 on the first set of one or more sub-carriers, and', 'transmitting the sequence S1 on the second set of one or more sub-carriers.

5. The method of claim 1 , wherein: in the physical layer of the cellular communication system, symbols of the synchronization signal, S1, are separated in a frequency domain; the first ordering of the pair of sequences, S; , S7 is effected by transmitting the sequence S1 on a first set of frequencies, and transmitting the sequence S7 on a second set of frequencies; and', 'the second ordering of the pair of sequences, S; , S7 is effected by', 'transmitting the sequence S7 on the first set of frequencies, and transmitting the', 'sequence S1 on the second set of frequencies.

5, = α£, + β£,; and L i', 'S2 = ^St +aSj , wherein:', 'CC is a first multiplicand; β is a second multiplicand, α âx89xa0 β .

6. The method of claim 1, comprising: generating the synchronization signals Si and S2 in accordance with: S1 =aS1 + $SJ; and', 'wherein: α is a first multiplicand; β is a second multiplicand, α âx89xa0 β .

7. The method of claim 6, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal amplitude.

8. The method of claim 6, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal power.

9. The method of claim 6, wherein the synchronization signals S1 and S2 and the sequences S1 and S7 are all of equal length

10. The method of claim 6, wherein: transmitting the synchronization signal Si comprises transmitting αS; and βS7 simultaneously; and transmitting the synchronization signal S2 comprises transmitting β S1 and OCS7 simultaneously

11. The method of claim 1, wherein the use of the first ordering of the sequences only for transmission in the known one of the time slots of the radio frame, and the use of the second ordering of the sequences only for transmission in said another known one of the time slots enables detection of radio frame timing using just one of the synchronization signals, Si and S2

12. A method of detecting timing parameters and an identity of a particular cell group from a number, M, of possible cell groups in a signal received in a cellular communication system that employs a radio frame in a physical layer, the radio frame comprising a number of time slots including two time slots associated with a synchronization channel, the method comprising: receiving, in one of the time slots associated with the synchronization channel, one of first and second synchronization signals, S1 and S2, wherein the first synchronization signal Si comprises a pair of sequences, S; , S7 arranged in a first ordering and the second synchronization signal S2 comprises the pair of sequences, S; , S7 arranged in a second ordering; determining which of a number of predefined sequences best matches the received sequence S1 , which of the number of predefined sequences best matches the received sequence S7 , and whether the pair of received sequences S15S7 were arranged in the first ordering or the second ordering, wherein the number of predefined sequences is selected from a group comprising at least', 'sequences; identifying the particular cell group by performing a cell group identification process that includes determining with which cell group the pair of received sequences, S; , S7 , is uniquely associated; and determining in which one of the two time slots associated with the synchronization channel the one of first and second synchronization signals was received by using information that indicates whether the sequences S; , S7 were received in the first ordering or the second ordering

13. The method of claim 12, wherein: the first ordering of the pair of sequences, S15S7 causes the sequence S1 to', 'be received before receiving the sequence S7 ; and the second ordering of the pair of sequences, S1, Sj causes the sequence', 'Sj to be received before receiving the sequence S1

14. The method of claim 13, wherein S1 and S2 are each of length n, and each of the sequences S15S7 is of length nil

15. The method of claim 12, wherein: the physical layer of the cellular communication system employs Orthogonal Frequency Division Multiplexing; the first ordering of the pair of sequences, S15S7 causes the sequence S1 to', 'be received on a first set of one or more sub-carriers, and the sequence S7 to be received on a second set of one or more sub-carriers; and the second ordering of the pair of sequences, S15S7 causes the sequence', 'S7 to be received on the first set of one or more sub-carriers, and the sequence S1 to be received on the second set of one or more sub-carriers

16. The method of claim 15, wherein the first and second synchronization signals, Si and S2, and the sequences S1 and S7 are all of equal length

17. The method of claim 12, wherein: in the physical layer of the cellular communication system, symbols of the synchronization signal, Si, are separated in a frequency domain; the first ordering of the pair of sequences, S15S7 causes the sequence S1 to', 'be received on a first set of frequencies, and the sequence S7 to be received on a second set of frequencies; and the second ordering of the pair of sequences, S1, Sj causes the sequence', 'Sj to be received on the first set of frequencies, and the sequence S1 to be received on the second set of frequencies

18. The method of claim 12, wherein determining whether the pair of received sequences S1 , Sj were arranged in the first ordering or the second ordering comprises: determining whether the received one of the first and second synchronization signals represents:

19. The method of claim 18, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal amplitude.

20. The method of claim 18, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal power.

21. The method of claim 18, wherein the first and second synchronization signals, and S2, and the sequences S1 and Sj are all of equal length.

22. The method of claim 12, wherein receiving, in one of the time slots associated with the synchronization channel, one of the first and second synchronization signals S1 and S2 comprises: receiving the pair of sequences S15S7 simultaneously.

23. The method of claim 12, comprising: detecting radio frame timing by using information that indicates in which one of the two time slots associated with the synchronization channel the one of the first and second synchronization signals was received.

24. The method of claim 12, wherein identifying the particular cell group by determining with which cell group the pair of received sequences, St,Sj , is', 'uniquely associated comprises using the pair of received sequences S1, Sj to locate an entry in a look-up table.

25. The method of claim 12, wherein identifying the particular cell group by determining with which cell group the pair of received sequences, S,,Sj , is uniquely associated is performed by calculation circuitry.

26. The method of claim 12, wherein using information about whether the sequences S1 , Sj were arranged in the first ordering or the second ordering to determine in which one of the two time slots associated with the synchronization channel the received one of the first and second synchronization signals was received comprises using the pair of received sequences S1, Sj to locate an entry in a look-up table.

27. The method of claim 12, wherein using information about whether the sequences S1 , Sj were arranged in the first ordering or the second ordering to determine in which one of the two time slots associated with the synchronization channel the received one of the first and second synchronization signals was received is performed by calculation circuitry.

28. The method of claim 12, comprising: receiving, in an other one of the time slots associated with the synchronization channel, an other one of the first and second synchronization signals; determining whether a type of cell search procedure to be performed is an inter- frequency cell search procedure; determining whether the type of cell search procedure to be performed is an inter-radio access technology cell search procedure; determining whether the type of cell search procedure to be performed is an intra-cell search procedure; if the type of cell search procedure to be performed is none of the inter- frequency cell search procedure, the inter-radio access technology cell search procedure, or the intra-cell search procedure, then performing: determining which of the number of predefined sequences best matches the received sequence S1 of the other one of the first and second synchronization signals, which of the number of predefined sequences best matches the received sequence S} of the other one of the first and second', 'synchronization signals, and whether the pair of received sequences S1, Sj of the other one of the first and second synchronization signals were arranged in the first ordering or the second ordering, wherein the cell group identification process further includes determining with which cell group the pair of received sequences, S,,Sj , of the other one of the first and second synchronization signals is uniquely associated.

29. An apparatus for indicating timing parameters and an identity of a particular cell group from a number, M, of possible cell groups in a signal transmitted in a cellular communication system that employs a radio frame in a physical layer, the radio frame comprising a number of time slots, the apparatus comprising: logic configured to transmit, in a known one of the time slots of the radio frame, a synchronization signal, Si, that comprises a pair of sequences, S1, Sj arranged in a first ordering; and logic configured to transmit, in another known one of the time slots of the radio frame, a synchronization signal, S2, that comprises the pair of sequences,', 'S1 , Sj arranged in a second ordering, wherein: each member of the pair of sequences, St,Sj , is selected from a group', 'comprising at least NSeq = cei Jl l + y/Ïx8a+m λ d Îx94i.cfcferent sequences;', 'the selected pair of sequences is uniquely identified with the particular cell group, wherein i,je. l,...,NSeq and S1 âx89xa0 Sj ,- and the first ordering of the sequences is used only for transmission in the known one of the time slots of the radio frame, and the second ordering of the sequences is used only for transmission in said another known one of the time slots.

30. The apparatus of claim 29, wherein: the logic configured to transmit, in the known one of the time slots of the radio frame, the synchronization signal, Si, that comprises the pair of sequences, S1 , Sj arranged in the first ordering effects the first ordering of the pair of', 'sequences, S1 , Sj by transmitting the sequence S1 before transmitting the', 'sequence Sj ; and the logic configured to transmit, in said another known one of the time slots of the radio frame, the synchronization signal, S2, that comprises the pair of sequences, S1 , S arranged in the second ordering effects the second ordering of the pair of sequences, S1, Sj by transmitting the sequence Sj before transmitting', 'the sequence S1.

31. The apparatus of claim 30, wherein S1 and S2 are each of length n, and each of the sequences S15S7 is of length nil.

32. The apparatus of claim 29, wherein: the physical layer of the cellular communication system employs Orthogonal Frequency Division Multiplexing; the logic configured to transmit, in the known one of the time slots of the radio frame, the synchronization signal, Si1 that comprises the pair of sequences,', 'S; , S7 arranged in the first ordering effects the first ordering of the pair of', 'sequences, S15S7 by transmitting the sequence S1 on a first set of one or more', 'sub-carriers, and transmitting the sequence S7 on a second set of one or more sub-carriers; and the logic configured to transmit, in said another known one of the time slots of the radio frame, the synchronization signal, S2, that comprises the pair of sequences, S; , S7 arranged in the second ordering effects the second ordering of', 'the pair of sequences, S15S7 by transmitting the sequence S7 on the first set of', 'one or more sub-carriers, and transmitting the sequence S1 on the second set of one or more sub-carriers.

33. The apparatus of claim 32, wherein the first and second synchronization signals, Si and S2, and the sequences S1 and S7 are all of equal length.

34. The apparatus of claim 29, wherein: in the physical layer of the cellular communication system, symbols of the synchronization signal, Si, are separated in a frequency domain; the logic configured to transmit, in the known one of the time slots of the radio frame, the synchronization signal, Si, that comprises the pair of sequences,', 'S1 , Sj arranged in the first ordering effects the first ordering of the pair of', 'sequences, S1, Sj by transmitting the sequence S1 on a first set of frequencies, and', 'transmitting the sequence S; on a second set of frequencies; and the logic configured to transmit, in said another known one of the time slots of the radio frame, the synchronization signal, S2, that comprises the pair of sequences, S1 , Sj arranged in the second ordering effects the second ordering of', 'the pair of sequences, S1, Sj by transmitting the sequence Sj on the first set of', 'frequencies, and transmitting the sequence S1 on the second set of frequencies.

35. The apparatus of claim 29, comprising: logic configured to generate the synchronization signals Si and S2 in accordance with:

36. The apparatus of claim 35, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal amplitude.

37. The apparatus of claim 35, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal power.

38. The apparatus of claim 35, wherein the synchronization signals Si and S2 and the sequences S1 and S; are all of equal length.

39. The apparatus of claim 35, wherein: the logic configured to transmit the synchronization signal S1 comprises logic configured to transmit αS; and βS7 simultaneously; and the logic configured to transmit the synchronization signal S2 comprises transmitting βS; and OCS7 simultaneously.

40. The apparatus of claim 29, wherein the use of the first ordering of the sequences only for transmission in the known one of the time slots of the radio frame, and the use of the second ordering of the sequences only for transmission in said another known one of the time slots enables detection of radio frame timing using just one of the synchronization signals, Si and S2.

41. An apparatus for detecting timing parameters and an identity of a particular cell group from a number, M, of possible cell groups in a signal received in a cellular communication system that employs a radio frame in a physical layer, the radio frame comprising a number of time slots including two time slots associated with a synchronization channel, the apparatus comprising: logic configured to receive, in one of the time slots associated with the synchronization channel, one of first and second synchronization signals, Si and S2, wherein the first synchronization signal Si comprises a pair of sequences,', 'S; , S7 arranged in a first ordering and the second synchronization signal S2', 'comprises the pair of sequences, S15S7 arranged in a second ordering; logic configured to determine which of a number of predefined sequences best matches the received sequence S1 , which of the number of predefined sequences best matches the received sequence S7 , and whether the pair of', 'received sequences S; , S7 were arranged in the first ordering or the second ordering, wherein the number of predefined sequences is selected from a group', 'comprising at least NSeq = different sequences; logic configured to identify the particular cell group by performing a cell group identification process that includes determining with which cell group the pair of received sequences, St,Sj , is uniquely associated; and logic configured to determine in which one of the two time slots associated with the synchronization channel the one of first and second synchronization signals was received by using information that indicates whether the sequences S1 , Sj were received in the first ordering or the second ordering.

42. The app aratus o f claim 41 , wherein : the first ordering of the pair of sequences, S1, Sj causes the sequence S1 to', 'be received before receiving the sequence Sj ; and', 'the second ordering of the pair of sequences, S1, Sj causes the sequence', 'Sj to be received before receiving the sequence S1.

43. The apparatus of claim 42, wherein Si and S2 are each of length n, and each of the sequences S1, Sj is of length nil.

44. The apparatus of claim 41, wherein: the physical layer of the cellular communication system employs Orthogonal Frequency Division Multiplexing; the first ordering of the pair of sequences, S1, Sj causes the sequence S1 to', 'be received on a first set of one or more sub-carriers, and the sequence S; to be received on a second set of one or more sub-carriers; and the second ordering of the pair of sequences, S1, Sj causes the sequence', 'Sj to be received on the first set of one or more sub-carriers, and the sequence S1 to be received on the second set of one or more sub-carriers.

45. The apparatus of claim 44, wherein the first and second synchronization signals, S1 and S2, and the sequences S1 and S7 are all of equal length.

46. The apparatus of claim 41 , wherein: in the physical layer of the cellular communication system, symbols of the synchronization signal, S1, are separated in a frequency domain; the first ordering of the pair of sequences, S15S7 causes the sequence S1 to', 'be received on a first set of frequencies, and the sequence S7 to be received on a second set of frequencies; and the second ordering of the pair of sequences, S15S7 causes the sequence', 'S7 to be received on the first set of frequencies, and the sequence S1 to be received on the second set of frequencies.

47. The apparatus of claim 41, wherein the logic configured to determine whether the pair of received sequences S15S7 were arranged in the first ordering or the second ordering comprises: logic configured to determine whether the received one of the first and second synchronization signals represents: Or S2 = PS^aS7, wherein: CC is a first multiplicand; β is a second multiplicand, cc âx89xa0 β .

48. The apparatus of claim 47, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal amplitude.

49. The apparatus of claim 47, wherein each of the multiplicands, α and β , is a scalar value and corresponds to an amount of signal power.

50. The apparatus of claim 47, wherein the first and second synchronization signals, Si and S2, and the sequences S1 and Sj are all of equal length.

51. The apparatus of claim 41 , wherein the logic configured to receive, in one of the time slots associated with the synchronization channel, one of the first and second synchronization signals S1 and S2 comprises: logic configured to receive the pair of sequences S15S7 simultaneously.

52 = ^>S1 +aSj, wherein:', 'CC is a first multiplicand; β is a second multiplicand, α âx89xa0 β

52. The apparatus of claim 41, comprising: logic configured to detect radio frame timing by using information that indicates in which one of the two time slots associated with the synchronization channel the one of the first and second synchronization signals was received.

53. The apparatus of claim 41, wherein the logic configured to identify the particular cell group by determining with which cell group the pair of received sequences, S; , S7 , is uniquely associated comprises logic configured to use the', 'pair of received sequences S15S7 to locate an entry in a look-up table.

54. The apparatus of claim 41 , wherein the logic configured to identify the particular cell group by determining with which cell group the pair of received sequences, S; , S7 , is uniquely associated comprises calculation circuitry.

55. The apparatus of claim 41, wherein the logic configured to determine in which one of the two time slots associated with the synchronization channel the one of first and second synchronization signals was received by using information that indicates whether the sequences S1 , Sj were received in the first ordering or the second ordering comprises: a look-up table; and logic configured to use the pair of received sequences S1, Sj to locate an entry in the look-up table.

56. The apparatus of claim 41, wherein the logic configured to determine in which one of the two time slots associated with the synchronization channel the one of first and second synchronization signals was received by using information that indicates whether the sequences S1 , Sj were received in the first ordering or the second ordering comprises: calculation circuitry that takes as input the pair of received sequences

57. The app aratus o f claim 41 , comprising : logic configured to receive, in an other one of the time slots associated with the synchronization channel, an other one of the first and second synchronization signals; logic configured to determine whether a type of cell search procedure to be performed is an inter- frequency cell search procedure; logic configured to determine whether the type of cell search procedure to be performed is an inter-radio access technology cell search procedure; logic configured to determine whether the type of cell search procedure to be performed is an intra-cell search procedure; logic configured to respond to the type of cell search procedure to be performed being none of the inter- frequency cell search procedure, the inter-radio access technology cell search procedure, or the intra-cell search procedure, by performing: determining which of the number of predefined sequences best matches the received sequence S1 of the other one of the first and second synchronization signals, which of the number of predefined sequences best matches the received sequence S; of the other one of the first and second', 'synchronization signals, and whether the pair of received sequences S1, Sj of the other one of the first and second synchronization signals were arranged in the first ordering or the second ordering, wherein the cell group identification process further includes determining with which cell group the pair of received sequences, St,Sj , of the other one of the first and second synchronization signals is uniquely associated.']