Performance Analysis and Optimal Power Allocation for Linear Receivers Based on Superimposed Training

TL;DR

This paper compares the performance of time-division multiplexing and superimposed pilot schemes in MIMO systems, deriving BER expressions and optimal power allocation to improve receiver performance.

Contribution

It provides a performance comparison and closed-form BER expressions for two training schemes, introducing optimal power allocation for enhanced MIMO receiver efficiency.

Findings

Superimposed pilot scheme can outperform traditional schemes under optimal power allocation.

Closed-form BER expressions enable precise performance evaluation.

Optimal power distribution between pilot and data minimizes BER.

Abstract

In this paper, we derive a performance comparison between two training-based schemes for Multiple-Input Multiple-Output (MIMO) systems. The two schemes are thetime-division multiplexing scheme and the recently proposed data-dependent superimposed pilot scheme. For both schemes, a closed-form expressions for the Bit Error Rate (BER) is provided. We also determine, for both schemes, the optimal allocation of power between pilot and data that minimizes the BER.