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Signal processing algorithm for converting variable bandwidth in the multiple channel systems  

Yoo, Jae-Ho (인하대학교 전자공학과)
Kim, Hyeon-Su (인하대학교 전자공학과)
Choi, Dong-Hyun (인하대학교 전자공학과)
Chung, Jae-Hak (인하대학교 전자공학과)
Publication Information
Journal of Satellite, Information and Communications / v.5, no.1, 2010 , pp. 32-37 More about this Journal
Abstract
The algorithm of multiple channel signal processing requires the flexibility of variable frequency band, efficient allocation of transmission power, and flexible frequency band reallocation to satisfy various service types which requires different transmission rates and frequency band. There are three methods including per-channel approach, multiple tree approach, and block approach performing frequency band reallocation method by channelization and dechannelization in the multiple-channel signal. This paper proposes an improved per-channel approach for converting the frequency band of multiple carrier signals efficiently. The proposed algorithm performs decimation and interpolation using CIC(cascaded integrator comb filter), half-band filter, and FIR filter. In addition, it performs filtering of each sub-channel, and reallocates channel band through FIR low-pass filter in the multiple-channel signal. The computer simulation result shows that the perfect reconstruction of output signal and the flexible frequency band reallocation is performed efficiently by the proposed algorithm.
Keywords
Flexible frequency band reallocation; Overlapped window; Perfect reconstruction; Overlap & add method;
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