Efficient nonlinear equalization scheme for MIMO constant envelope modulation receivers affected by quantization error

Kohei Kotera, Osamu Muta, Hiroshi Furukawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

The authors have proposed Multi-Input Multi-Output (MIMO) constant envelope modulation (CEM) systems that enable to use a power-efficient nonlinear power amplifier on the transmitter side and a low resolution analog-to-digital converter (ADC) on the receiver side, where power consumption at the analog devices is effectively reduced by employing a low resolution ADC at the receiver. In such a receiver, the received signal is seriously affected by severe quantization error by the ADC and therefore BER performance is degraded. As a solution to performance degradation at the MIMO-CEM receiver affected by quantization error, in this paper, we propose efficient nonlinear (Viterbi) equalization schemes that estimate both inter-symbol interference in multi-path channel and quantization error in ADC, where quantization error is estimated by using a simple function that models the relation between the received signal level and the resulting quantization error. In addition, the proposed scheme effectively reduces the number of states in Viterbi equalization to achieve computational complexity reduction for equalizations. Computer simulation results show that the proposal nonlinear equalization scheme improves BER performance of MIMO-CEM receiver seriously affected by quantization error, while computational complexity is effectively reduced.

Original languageEnglish
Title of host publicationInternational Conference on Information Networking 2012, ICOIN 2012 - Conference Program
Pages275-279
Number of pages5
DOIs
Publication statusPublished - May 11 2012
Event26th International Conference on Information Networking 2012, ICOIN 2012 - Bali, Indonesia
Duration: Feb 1 2012Feb 3 2012

Publication series

NameInternational Conference on Information Networking
ISSN (Print)1976-7684

Other

Other26th International Conference on Information Networking 2012, ICOIN 2012
CountryIndonesia
CityBali
Period2/1/122/3/12

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Information Systems

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    Kotera, K., Muta, O., & Furukawa, H. (2012). Efficient nonlinear equalization scheme for MIMO constant envelope modulation receivers affected by quantization error. In International Conference on Information Networking 2012, ICOIN 2012 - Conference Program (pp. 275-279). [6164391] (International Conference on Information Networking). https://doi.org/10.1109/ICOIN.2012.6164391