Simulation of a baseband QPSK mod/demod: TX : a pseudo random bit stream generation, Serial to parallel conversion, QPSK Mapping (Gray coding), Signal power computation Channel : AWGN channel RX: Soft Demapping / Hard Demapping, Plot constellat

soft Demapping 8PSK : LLR computation using Euclidian distance approach, Parallel-to-Serial converter, needs I and Q componets of 8PSK symbols at the input

用于MIMO检测的sphere decoder程序- This function implements a soft output sphere decoder. Based on the paper: C. Studer, M. Wenk, A. Burg, and H. Blocskei: "Soft-Output Sphere Decoding: Performance and Implementation Aspects", Asilomar 2006

提出了一种软判决解映射的简化算法，简化算法同时提高性能(a new simplified soft-output demapping algorithm)