DocumentCode :
128529
Title :
Effects of MLSE equalization for constant envelope modulation signals affected by ADC nonlinearity
Author :
Fukunaga, Ryuta ; Muta, Osamu ; Furukawa, Hiroshi
Author_Institution :
Grad. Sch. of Inf. Sci. & Electr. Eng., Kyushu Univ., Fukuoka, Japan
fYear :
2014
fDate :
10-12 Feb. 2014
Firstpage :
530
Lastpage :
535
Abstract :
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.
Keywords :
MIMO communication; analogue-digital conversion; communication complexity; equalisers; error statistics; indoor radio; minimum shift keying; power amplifiers; quantisation (signal); radio transceivers; relay networks (telecommunication); sequential estimation; A/D converter nonlinearity; BER performance; CEM transceiver; MIMO receiver circuit; MLSE equalization effect; SISO D-GMSK systems; analog hardware complexity; constant envelope modulation signal; differential encoded Gaussian minimum shift keying; indoor wireless communication system; multiple input multiple output; power amplifier; power efficiency; quantization error; radio relay multihop transmission; reduced state modified maximum sequence estimation; transmitter; Approximation methods; Bit error rate; MIMO; Maximum likelihood estimation; Measurement; Receivers; Signal resolution; A/D conversion (ADC); ADC nonlinearity; Constant envelope modulation; MLSE;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Networking (ICOIN), 2014 International Conference on
Conference_Location :
Phuket
Type :
conf
DOI :
10.1109/ICOIN.2014.6799738
Filename :
6799738
Link To Document :
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