| The TD-SCDMA system, which is the self-innovation mobile communication technology of China, the development progress is greatly accelerated at present. In recent two years, many trial networks have been performed for TD-SCDMA system in China. Node B plays an important part of the whole network. When technology is matured improved, the whole industry will be better supported.In this paper, an in-depth analysis on the wireless interface protocol and specification of TD-SCDMA system is made. We set up a system realization model. Then, the algorithm of each module in the realization model is dicussed. The main algorithms included are: CRC attachment, transport block concatenation and code block segmentation, channel coding/decoding, radio frame equalization, first interleaveing and deinterleaving, radio frame segmentation, rate matching/dematching, transport channel multiplexing/demultiplexing, physical channel segmentation, second interleaving/Deint -erleaving, physical channel mapping, etc.After the analysis of algorithms, we simulate the process of channel coding and multiplexing and decoding and demutiplexing of TD-SCDMA for uplink based on MATLAB, to ensure the method is right in ideal channel. Based on simulation result, the technology of channel decoding and demultiplexing for uplink of Node B receiver is programmed using MSC8144ADS. Then, we set up a test platform for hardware module and the BER-SNR plot is presented. Finally, we do some analysis on the result of hardware realization.Simulation and design of this paper as an important part of the whole frame of TD-SCDMA uplink baseband signal processing, bring some experiences and make technical accumulation for further study. |
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