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In this paper, we propose to approach the capacity limit for channels with fast phase variation by using a serial concatenation scheme with an outer turbo encoder and an inner block modulator. A distinct feature of the proposed transmission scheme is that coded symbols from adjacent codewords are interleaved into the same input vectors of the block modulator. At the receiver, we not only perform the...
A digital baseband receiver ASIC that supports GSM/GPRS/EDGE and Evolved EDGE is implemented in 0.13 ??m CMOS technology. The design centers around two main blocks: an adaptive channel equalizer processes GMSK/8PSK/16QAM and 32 QAM modulated signals and a flexible channel decoder supports convolutional and turbo codes, as required for Evolved EDGE. The receiver occupies 2.0 mm2 and the average power...
We present a blind turbo equalizer for QAM signals that exploits the statistics that a channel code imposes on the transmitted signal. The receiver is an adaptation of previous work presented in [1], where a BPSK signal is encoded by a binary code and blindly recovered in a turbo way. The main concept is to exploit the constraints imposed by the parity check equations of the code on the transmitted...
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