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This paper proposes a minimum mean square error (MMSE)-based algorithm for semi-blind estimation of a complex fading channel matrix. By approximating the channel product matrices to channel autocorrelation matrix, which is gained from the covariance matrix of the received data, a novel semi-blind algorithm named MMVE (MMSE to EVD technique) is rebuilt. The eigenvalue-eigenvector decomposition (EVD)...
Symbol mapping is very crucial for the performance of bit-interleaved coded modulation with iterative decoding (BICM-ED). In this paper, an analysis method of the performances of symbol mappings is proposed. This method is via analysis based on harmonic mean of the minimum Euclidean distance and distance spectrum of Euclidean distances for mappings. Harmonic mean centered on the average of Euclidean,...
The extrinsic information and the received systematic observations exert different influence on decision-making with the change of SNR values for turbo iterative decoding. By multipling a weighted coefficient for the priori information, this paper proposed a novel adaptive iterative soft decoding algorithm for turbo codes, which alters the proportion of the extrinsic information and the received systematic...
To proceed iterative decoding by choosing every output sequence of the constituent encoders as the start sequence in turn, multiple different extrinsic information sequences can be obtained due to the existence of interleavers as well as different initial decoding conditions and tail-bit lengths. To assemble them before making decision, more extrinsic information can be gathered. This results in more...
This paper describes the theory, technical features and benefits of a new Synchronous FM system. We have provided the user with the whole Audio Transmission System and Digital FM Exciter solution, which is crucial for the Implementation of Synchronous FM.
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