TY - GEN
T1 - Effects of MLSE equalization for constant envelope modulation signals affected by ADC nonlinearity
AU - Fukunaga, Ryuta
AU - Muta, Osamu
AU - Furukawa, Hiroshi
PY - 2014
Y1 - 2014
N2 - A radio relay multi-hop transmission using Multi-Input Multi-Output (MIMO) is a promising technique to construct indoor wireless communication systems. To improve power efficiency at the power amplifier on the transmitter side, this paper considers MIMO constant envelope modulation (CEM) transceiver. On the other hand, the resolution of A/D converter (ADC) affects hardware complexity on MIMO receiver circuits. Although analog hardware complexity on MIMO receiver circuits can be reduced by decreasing the resolution of ADC, it causes severe ADC nonlinearity which affects achievable performance, i.e., there a trade-off between hardware complexity and non-linearity on ADC circuits for MIMO receiver. The objective of this paper is to investigate the influence of ADC nonlinearity on achievable performance in MIMO differential encoded Gaussian minimum shift keying (D-GMSK) systems using a reduced-state modified maximum sequence estimation (MLSE) equalization. In the MLSE equalization for D-GMSK systems, the influence of ADC nonlinearity is mitigated by approximating the received signal in presence of quantization error. Computer simulation results show that the MLSE equalization scheme approximating the influence of ADC nonlinearity improves BER performance of MIMO and SISO D-GMSK systems using a low resolution ADC compared to cases without using the above approximation in multi-path Rayleigh fading conditions.
AB - A radio relay multi-hop transmission using Multi-Input Multi-Output (MIMO) is a promising technique to construct indoor wireless communication systems. To improve power efficiency at the power amplifier on the transmitter side, this paper considers MIMO constant envelope modulation (CEM) transceiver. On the other hand, the resolution of A/D converter (ADC) affects hardware complexity on MIMO receiver circuits. Although analog hardware complexity on MIMO receiver circuits can be reduced by decreasing the resolution of ADC, it causes severe ADC nonlinearity which affects achievable performance, i.e., there a trade-off between hardware complexity and non-linearity on ADC circuits for MIMO receiver. The objective of this paper is to investigate the influence of ADC nonlinearity on achievable performance in MIMO differential encoded Gaussian minimum shift keying (D-GMSK) systems using a reduced-state modified maximum sequence estimation (MLSE) equalization. In the MLSE equalization for D-GMSK systems, the influence of ADC nonlinearity is mitigated by approximating the received signal in presence of quantization error. Computer simulation results show that the MLSE equalization scheme approximating the influence of ADC nonlinearity improves BER performance of MIMO and SISO D-GMSK systems using a low resolution ADC compared to cases without using the above approximation in multi-path Rayleigh fading conditions.
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U2 - 10.1109/ICOIN.2014.6799738
DO - 10.1109/ICOIN.2014.6799738
M3 - Conference contribution
AN - SCOPUS:84899928016
SN - 9781479936892
T3 - International Conference on Information Networking
SP - 530
EP - 535
BT - International Conference on Information Networking 2014, ICOIN 2014
PB - IEEE Computer Society
T2 - 2014 28th International Conference on Information Networking, ICOIN 2014
Y2 - 10 February 2014 through 12 February 2014
ER -