Abstract
A method and apparatus for transmitting or detecting primary synchronization signal. The receiver receives primary synchronization signal from a transmitter, and detects the sequence used in the received primary synchronization signal by using three root indexes. Here, the primary synchronization signal is generated by using a Zadoff-Chu sequence having one of the three root indexes. The three root indexes comprise a first index and a second index, and a sum of the first index and the second index corresponds to the length of the Zadoff-Chu sequence.
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Specification Information
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Technologies
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Product
Use Cases
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Claim
1. A method of detecting a sequence used in a synchronization signal by a receiver in a mobile communication system, the method comprising:
receiving the synchronization signal from a transmitter; and
detecting the sequence used in the received synchronization signal by determining a correlation value between the received synchronization signal and each of predetermined sequences,
wherein the predetermined sequences comprises a first sequence and a second sequence, the first sequence and the second sequence having a complex-conjugate relationship,
wherein the predetermined sequences are defined based on a Zadoff-Chu sequence, and
wherein a sum of a first root index of the first sequence and a second root index of the second sequence corresponds to a length of the Zadoff-Chu sequence.
2. The method of claim 1, further comprising:
performing synchronization based on the detected sequence.
3. The method of claim 1, wherein determining the correlation value comprises:
acquiring intermediate values when determining a first correlation value between the received synchronization signal and the first sequence; and
determining a second correlation value between the received synchronization signal and the second sequence by reusing the intermediate values acquired when determining the first correlation value.
4. The method of claim 3, wherein the second correlation value is determined only by one or more of adding and subtracting operations between the intermediate values without multiplexing operating.
5. The method of claim 3, wherein the intermediate values include:
a first value indicating a cross-correlation value between a real part of the received synchronization signal and a real part of the first sequence;
a second value indicating a cross-correlation value between an imaginary part of the received synchronization signal and an imaginary part of the first sequence;
a third value indicating a cross-correlation value between the imaginary part of the received synchronization signal and the real part of the first sequence; and
a fourth value indicating a cross-correlation value between the real part of the received synchronization signal and the imaginary part of the first sequence.
6. The method of claim 1,
wherein the synchronization signal is a primary synchronization signal, and
wherein a correlation value is a cross-correlation value.
7. A receiver device for detecting a sequence used in a synchronization signal in a mobile communication system, the receiver device comprising:
a receiver configured to receive the synchronization signal from a transmitter device; and
a processor configured to detect the sequence used in the received synchronization signal by determining a correlation value between the received synchronization signal and each of predetermined sequences,
wherein the predetermined sequences comprises a first sequence and a second sequence, the first sequence and the second sequence having a complex-conjugate relationship,
wherein the predetermined sequences are defined based on a Zadoff-Chu sequence, and
wherein a sum of a first root index of the first sequence and a second root index of the second sequence corresponds to a length of the Zadoff-Chu sequence.
8. The receiver device of claim 7, wherein the processor is further configured to perform synchronization based on the detected sequence.
9. The receiver device of claim 7, wherein the processor acquires intermediate values when calculating a first correlation value between the received synchronization signal and the first sequence; and reuses the intermediate values to calculate a second correlation value between the received synchronization signal and the second sequence.
10. The receiver device of claim 9, wherein the processor calculate the second correlation value only by one or more of adding and subtracting operations between the intermediate values without multiplexing operating.
11. The receiver device of claim 9, wherein the intermediate values include:
a first value indicating a cross-correlation value between a real part of the received synchronization signal and a real part of the first sequence;
a second value indicating a cross-correlation value between an imaginary part of the received synchronization signal and an imaginary part of the first sequence;
a third value indicating a cross-correlation value between the imaginary part of the received synchronization signal and the real part of the first sequence; and
a fourth value indicating a cross-correlation value between the real part of the received synchronization signal and the imaginary part of the first sequence.
12. The receiver device of claim 7,
wherein the synchronization signal is a primary synchronization signal, and
wherein a correlation value is a cross-correlation value.
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.