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High-speed descending sharing channel coding multiplexing method and system
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A shared channel and coding technology, applied in the field of wireless communication, can solve the problems that 64QAM cannot be directly used, and the existing solutions cannot meet the requirements of 64QAM.
Active Publication Date: 2008-05-07
HUAWEI TECH CO LTD
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[0054] However, the existing HS-DSCH code multiplexing scheme does not take into account the impact of 64QAM, the existing scheme cannot meet the requirements of 64QAM, and cannot directly use 64QAM on the basis of the existing scheme
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no. 1 approach
[0148] The first embodiment about interleaving is as follows:
[0149] The subframe structure of HS-PDSCH is as follows Figure 5 , its spreading factor is 16, so when 64QAM modulation is adopted, the number of bits carried by each time slot is 960, and the number of bits carried by one subframe is 2880. The bit sequence u input to the interleaver p，1 , u p，2 , u p，3,...,u p，U , when using 64QAM modulation, U should be 2880. Therefore, when the 64QAM modulation mode is adopted, we provide the following interleaving scheme. Using three interleavers of the same size (R2 × C2 = 32 × 30), the bit sequence output by the physical channel segmentation module is divided into three-way sequences, u p，k and u p，k+1 sent to interleaver 1, u p，k+2 and u p，k+3 sent to interleaver 2, u p，k+4 and u p，k+5 Sent to the interleaver 3, each sequence is interleaved through the interleaver of R2×C2=32×30, as in 6, the output of the interleaver 1 is v p，k and v p，k+1 , the output of int...
no. 2 approach
[0151] The second embodiment about interleaving is as follows:
[0152] This implementation is suitable for 64QAM modulation, such as Figure 7 shown. When adopting 64QAM modulation mode, adopt the interleaver of two system sizes (R2*C2=48*30), the bit sequence that the physical channel segmentation module outputs is divided into 2-way sequence, u p，k , u p，k+1 and u p，k+2 sent to interleaver 1, u p，k+3 , u p，k+4 and u p，k+5 Sent to interleaver 2, each sequence is interleaved through the interleaver of R2×C2=48×30, and the output of interleaver 1 is v p，k and v p，k+1 , v p，k+2 , the output of interleaver 2 is v p，k+3 ,, v p，+4 and v p，k+5 .
[0153] When using 64QAM modulation, constellation reorganization is required. The input bits are divided into 6 groups, and the v p，k , v p，k+1 , v p，k+2 , v p，k+3 , v p，k+4 ,, v p，k+5 , mapped to r p，k , r p，k+1 , r p，k+2 , r p，k+3，1 , r p，k+4 ,,r p，k+5 , where k mod 6=1.
[0154] A first implementation of const...
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Abstract
The present invention relates to the radio communication field and discloses a method and a system for high-speed downlink shared channel coding multiplexing. In the process of HARQ bit combination, the method uses read-in in order and skip read-out, read-in in arrangement and read-out in row or read-in in row and read-out in arrangement which enhances the interweaving effect. A plurality of parameter designs is advanced and the better transmission effect can be obtained when a second velocity matches. The bit sequence obtained by dividing the physical channel is divided into three sequences which are separately interwoven by the interweaving machines with the same size; on one hand, the requirements of 64QAM is met, on the other hand, the compatibility is better. A plurality of plans for constellation rearrangement is advanced, which is used in HARQ reemission or transmitted before or reemits difference output bit sequence; in this way, the reliability of every bit is equal and the overall transmission quality is promoted.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to high-speed downlink shared channel coding and multiplexing technology. Background technique [0002] As an enhanced downlink wirelesstransmission technology, High Speed Downlink Packet Access (HSDPA for short) adopts link adaptive technology based on adaptive modulation and coding, retransmission based on physical layer and soft combining Key technologies such as HybridAutomatic Repeat Request (HARQ for short), fast multi-user packet scheduling, and 2ms short frames have obvious advantages such as high spectral efficiency, high downlink transmission rate, and small transmission delay. Therefore, effective support can be provided for packet data services. [0003] Enhanced Dedicated Channel (Enhanced Dedicated Channel, "E-DCH") is also called High Speed Uplink Packet Access (High Speed Uplink Packet Access, "HSUPA"). Node B") uplink fast packet scheduling, fast HARQ...
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