Receiver design for the uplink of base station cooperation systems employing SC-FDE modulations

Filipe Casal Ribeiro,Adão Silva,Francisco Cercas,Rui Dinis

doi:10.1186/s13638-014-0237-6

Abstract

The presented paper considers the uplink transmission in base station (BS) cooperation schemes where mobile terminals (MTs) in adjacent cells share the same physical channel. We consider single-carrier with frequency-domain equalization (SC-FDE) combined with iterative frequency-domain receivers based on the iterative block decision feedback equalization (IB-DFE). We study the quantization requirements when sending the received signals, from different MTs, at different BSs to a central unit that performs the separation of different MTs using iterative frequency-domain receivers. Our performance results show that a relatively coarse quantization, with only 4 bits in the in-phase and quadrature components of the complex envelope already allows close-to-optimum macro-diversity gains, as well as an efficient separation of the transmitted signals associated with each MT.

Highlights

It is expected that the demand for wireless services will continue to increase in the near and medium term, calling for more capacity and putting more and more pressure on the usage of radio resources
RN = 2σN2 IR and RD = 2diag σD(1)2, σD(2)2, . . . , σD(R)2 are the correlations matrices for the channel noise and quantization noise, 4 Performance results we present a set of performance results considering the proposed iterative frequency-domain receivers for the uplink of base station (BS) cooperation schemes employing single-carrier with frequency-domain equalization (SC-FDE) modulations with the corresponding quantization impact
Considering a BS cooperation scenario with P = 2 mobile terminals (MTs) transmitting simultaneously to R = 2 BSs, the corresponding bit error rate (BER) performance for the first MT, i.e., the MT that is first detected in our successive interference cancelation (SIC)-like iterative FDE, and second one, i.e., the MT that is detected in second place, are presented in Figures 12 and 13, respectively

Summary

Introduction

It is expected that the demand for wireless services will continue to increase in the near and medium term, calling for more capacity and putting more and more pressure on the usage of radio resources. The separation of the signals associated with different MTs is performed using iterative frequency-domain receivers based on the iterative block decision feedback equalization (IBDFE) concept [17-19].

Results

Conclusion