CN1223081C

Not Available

Title

CONTROL OF POWER RATIOS FOR IN-PHASE AND QUADRATURE CHANNELS IN A COMMUNICATIONS SYSTEM

Application Number:

CN1999810108

Publication Date:

12-10-2005

Current Assignee:

CLUSTER LLC

Family ID:

22491371

Application Date:

23-08-1999

Publication Country:

US

View on Espacenet

Priority Date:

26-08-1998

Declaring Company:

ERICSSON INC , OPTIS

Abstract  Abstract

transmitting a group of data in-phase (I) channel transmitter of a wideband code division multiple access (WCDMA) communication system in the radio communication system transmit an additional set of data the quadrature (Q) channel. the transmitter generates a gain signal ? and the digital data of the Q channel multiplied by the gain signal ?. by the gain signal ? is limited to the value of the number can be an accurate representation of the by the predetermined number of bits is limited say to 4 bit value of the binary right reduces the complexity of the multiplication operation. related to quantization by the same quantization value of modulation error can be used in the radio communication system of the ? in all the components to be reduced ?.

A transmitter in a radiocommunications system such as a Wideband Code Division Multiple Access (WCDMA) communications system transmits one set of data on an in-phase (I-) channel and another set of data on a quadrature (Q-) channel. The transmitter generates a gain signal beta and multiplies the digital data associated with the Q-channel by the gain signal beta . Complexity of the multiplication operation is reduced by limiting the gain signal beta to a finite nubmer of values that are exactly representable by a predefined number of bits such as 4-bit values to the right of a binary radix point. Modulation inaccuracy associated with quantization of beta can be eliminated by utilizing the same quantized values of beta in all components within the radiocommunications system.

A transmitter in a radiocommunications system such as a Wideband Code Division Multiple Access (WCDMA) communications system transmits one set of data on an in-phase (I-) channel and another set of data on a quadrature (Q-) channel. The transmitter generates a gain signal ? and multiplies the digital data associated with the Q-channel by the gain signal ?. Complexity of the multiplication operation is reduced by limiting the gain signal ? to a finite nubmer of values that are exactly representable by a predefined number of bits such as 4-bit values to the right of a binary radix point. Modulation inaccuracy associated with quantization of ? can be eliminated by utilizing the same quantized values of ? in all components within the radiocommunications system.

Note:

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