Signal Detection for 8 PSK and 16 QAM in EST-Based Modulation

Maximum-likelihood Modulation Classification for Psk/qam

This paper addresses automatic modulation classification for PSK and QAM signals under coherent and noncoherent conditions. In particular, the paper extends previous results by treating the classification of higher-state QAM signals. A maximum-likelihood algorithm is presented for coherent classification of PSK and QAM signals. We evaluate the algorithms performance for various PSK and QAM modu...

Mitigation of nonlinear transmission effects for OFDM 16-QAM optical signal using adaptive modulation.

The impact of the fiber Kerr effect on error statistics in the nonlinear (high power) transmission of the OFDM 16-QAM signal over a 2000 km EDFA-based link is examined. We observed and quantified the difference in the error statistics for constellation points located at three power-defined rings. Theoretical analysis of a trade-off between redundancy and error rate reduction using probabilistic...

Noisy Index Coding with PSK and QAM

Noisy index coding problems over AWGN channel are considered. For a given index coding problem and a chosen scalar linear index code of length N , we propose to transmit the N index coded bits as a single signal from a 2 PSK constellation. By transmitting the index coded bits in this way, there is an N/2 fold reduction in the bandwidth consumed. Also, receivers with side information satisfying ...

16-QAM Hierarchical Modulation Optimization in Relay Cooperative Networks

Proposal for a New Sub-Optimal Decoding Algorithm for Block Codes in 8-PSK and 16-PSK Constellations

This is an extension algorithm previously presented in [1] for decoded modulation systems with block codes for 8-PSK and 16-PSK constellations. The proposed algorithm presents a search mechanism of the least reliable points from the first code array and generate vectors for the Modified BCM, ZNA decoder, described in [1]. It is also presented a mapping of the 8-PSK and 16-PSK constellations in ...