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Lattice code modulation method and multiple users receiver

A trellis coding modulation and receiving device technology, applied in the field of multi-user detection technology and channel coding technology, can solve problems such as unfavorable decoding performance and symbol energy gap, achieve good decoding performance, improve demodulation performance, and improve performance Effect

Inactive Publication Date: 2009-01-21
HUAWEI TECH CO LTD
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Problems solved by technology

Therefore, the large gap in symbol energy in existing trellis coded modulation schemes is not good for improving decoding performance

Method used

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  • Lattice code modulation method and multiple users receiver
  • Lattice code modulation method and multiple users receiver
  • Lattice code modulation method and multiple users receiver

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Embodiment Construction

[0041] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0042] New schemes for trellis coded modulation such as Figure 8 shown. Under the new trellis coding modulation scheme, the spreading factor is 64. In the new trellis coded modulation scheme, the DTCH channel still performs CRC check on the input information sequence first, adds tail bits, and then performs TCM processing, the first interleaving, wireless frame segmentation and rate matching. The DCCH channel also first performs CRC check on the input information sequence, adds tail bits, and then performs T-rate convolution coding, 8PSK modulation, first interleaving, wireless frame segmentation and rate matching on the input sequence.

[0043] In rate matching, the average symbol repetition rate is (505-M) / (95+M). The number of input symbols of DTCH is still (65+M), and the number of output symbols is a=(600-[30*600 / (95+M)]). Suppos...

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Abstract

This invention puts forward a lattice coding modulation method and a multiuser receiver. DTCH channel carries out CRC check to the input information sequence adding tail bit and TCM process, a first time interleave, radio frame split and rate match, DTCH channel carries out CRC check to the input information sequence, tail bit addition then 1 / 3 rate rolling code to the input sequence, 8psk modulation, a first time interleave, radio frame split and rate match to multiplex the two DTCH symbols to one and to interleave it the second time and split its slot. The SF of DPDCH is 64 in the said TCM process, keeping the demodulation performance of multiuser receiving devices to further in crease performance of its test system.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to channel coding technology, modulation technology and multi-user detection technology of base station in uplink dedicated physical channel in WCDMA system. technical background [0002] The prior art proposes a trellis coded modulation scheme for a 12.2 kbps uplink dedicated physical channel in a WCDMA system and a corresponding multi-user receiving device. The trellis-coded modulation scheme has great potential in improving the performance of multi-user detection systems. The trellis coded modulation scheme is as figure 1 As shown, the parameters of the coded modulation scheme are shown in Table 1. [0003] Table 1 [0004] [0005] from figure 1 It can be seen that under the 12.2kbps uplink dedicated physical channel, the DTCH channel first performs CRC check on the input information sequence, adds tail bits, and then performs TCM processing, that is, performs 2-...

Claims

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Application Information

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IPC IPC(8): H04J13/00H04B7/26H04Q7/34H03M13/03H03M13/23H04L1/00
Inventor 魏立梅
Owner HUAWEI TECH CO LTD
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