Joint Processing in Coordinated Multi-Point (CoMP) Transmission: Zero-Forcing Precoding Implementation and Analysis

This article provides a comprehensive examination of two key Coordinated Multi-Point (CoMP) transmission schemes: Joint Processing (CoMP-JP) and Coordinated Beamforming (CoMP-CB). We focus specifically on the fundamental principles and implementation of Zero-Forcing precoding, detailing its algorithmic implementation through matrix inversion techniques for interference cancellation. The implementation typically involves calculating the pseudo-inverse of the channel matrix H using H⁺ = Hᴴ(HHᴴ)⁻¹ to eliminate inter-user interference. We further explore the application of these techniques within CoMP systems, where base stations coordinate transmissions to enhance spectral efficiency. Through MATLAB-based simulation analysis, we evaluate key performance metrics including bit error rate (BER), spectral efficiency, and signal-to-interference-plus-noise ratio (SINR) using Monte Carlo methods. This study offers valuable insights into CoMP technology, providing practical reference for research and implementation in wireless communication systems.