空时码和Turbo码联合编码的最新著作

Frainkey

【文件名】:06530@52RD_SPACE-TIME TURBO CODED MODULATION.rar
【格　式】:rar
【大　小】:862K
【简　介】:High computational complexity constrains truly exhaustive computer searches for good space-time (ST) coded modulations mostly to low constraint length space-time trellis codes (STTrCs). Such codes are primarily devised to achieve maximum transmit diversity gain. Due to their low memory order, optimization based on the design criterion of secondary importance typically results in rather modest coding gains. As another disadvantage of limited freedom, the different low memory order STTrCs are almost exclusively constructed for either slow or fast fading channels. Therefore in practical applications characterized by extremely variable Doppler frequencies, the codes typically
fail to demonstrate desired robustness. On the other hand, the main drawback of eventually increased constraint lengths is the prohibitively large decoding complexity, which may increase exponentially if optimal maximum-likelihood decoding (MLD) is applied at the receiver. Therefore, robust ST coded modulation schemes with large equivalent memory orders structured as to allow sub-optimal,low complexity, iterative decoding are needed.
Keywords: code optimization, convergence analysis, distance spectrum, OFDM, spacetime
coding, turbo coding, union bound, WCDMA
【目　录】:
1 Introduction
2 Literature survey
3 Scope of the thesis
4 Summary of the original publications
5 Conclusions