Method for coding channels for multi-user reception in WCDMA system

A channel coding and multi-user technology, applied in the field of multi-user detection technology and channel coding technology of the base station, to achieve the effect of improving the spreading factor and maintaining the detection performance

Inactive Publication Date: 2004-06-30
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

[0022] The purpose of the present invention is to provide a channel coding method for multi-user reception in a WCDMA system for the 12.2kbps uplink dedicated physical channel, the coding method makes the spreading factor of the user's DPDC...

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  • Method for coding channels for multi-user reception in WCDMA system
  • Method for coding channels for multi-user reception in WCDMA system
  • Method for coding channels for multi-user reception in WCDMA system

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] At the sending end of the WCDMA system, the user equipment (UE) sends information bits on the 12.2kbps uplink dedicated physical channel according to the following procedures:

[0038] The information bits of the dedicated physical data channel (DPDCH) are channel-coded first, and then BPSK-mapped, and the information obtained by BPSK mapping is spread according to the spreading factor of the DPDCH channel obtained by channel coding. However, the information bits of the DPCCH channel are directly subjected to BPSK mapping and spreading, and the spreading factor is 256. Figure 7 What is shown is a schematic diagram of the spreading and scrambling process of the 12.2kbps uplink dedicated physical channel in the existing WCDMA protocol. Such as Figure 7 As shown, the spread DPDCH channel chips and DPCCH channel chips constitute I and Q two-way d...

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Abstract

The method for coding channel is for dedicated physical data channel (DPDCH) of 12.2 kbps up run dedicated physical data channel particularly. Under condition of raising factor of spread spectrum and lowering complexity of encoder and decoder, capability of detecting DPDCH and dedicated physical control channel (DPCCH) of multiple users' receiving set is kept and improved slightly.

Description

technical field [0001] The invention relates to a communication system, in particular to a channel coding technique for an uplink dedicated physical channel in a wideband code division multiple access (WCDMA) cellular mobile communication system and a multi-user detection technique for a base station. Background technique [0002] The agreement of 3GPP brings together a complete set of standards of WCDMA system. According to the 3GPP protocol, the information bits of the dedicated physical data channel (DPDCH) in the uplink dedicated physical channel are channel-coded first, and then binary phase-shift keying (BPSK) mapping and spectrum spreading are performed. The information bits of the dedicated physical control channel (DPCCH) are directly mapped and spread by BPSK, and the spreading factor is 256. The spread-spectrum DPDCH channel chip and DPCCH channel chip constitute I and Q two-way data, which are scrambled together. The scrambled I and Q...

Claims

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Application Information

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IPC IPC(8): H04B1/69H03M13/05
Inventor 魏立梅
Owner HUAWEI TECH CO LTD
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