Physical Layer Realization Technology Research On TD-SCDMA Wireless Interface

Firstly, this paper deeply studies the TD-SCDMA wireless interface protocols and specifications, and sets up a system realization model. Secondly, the concrete algorithm of each module in the realization model is discussed. The main algorithms included are: CRC attachment, transport block concatenation and code block segmentation, channel coding/decoding (1/2 or 1/3 rate convolution coding/decoding, 1/3 rate turbo coding /decoding), radio frame equalization, first interleaving/deinterleaving, radio frame segmentation, rate matching/dematching, transport channel multiplexing/demultiplexing, physical channel segmentation, second interleaving/deinterleaving, physical channel mapping, frequency spreading/despreading, scrambling/descrambling, modulation/ demodulation, AWGN channel model,, and interference model. Then with the C language, Visual C++6.0, and MATLAB, the author develops the software of TD-SCDMASim V1.0. With the software, we simulate the process of TD-SCDMA wireless interface. Through the analysis of simulation results, the performance of TD-SCDMA wireless intereface is discussed, and several factors that influence system performance are analyzed and evaluated. Finally the core program of baseband sending and receiving process is transplanted to the hardware platform .Then I do some hardware realization.