Patent ID: 8885766
Filing Date: 2014-11-11
Classification: H03K,H04B,H04L

Abstract:
1. A communication device configured to generate n-dimensional double square quadrature amplitude modulation (nDSQ) coded signals for pulse amplitude modulation with m levels (PAMm), the device comprising: a communication interface for receiving incoming data; a clock data recovery circuit configured to process the incoming data; an encoder configured to encode the incoming data into coded symbols, each coded symbols comprising most significant bits (MSBs) and least significant bits (LSBs); a symbol mapper that maps the coded symbols into the n-dimensional DSQ constellation, wherein: the MSBs comprising (2*n) bits are mapped to PAM (m/2) symbols; the LSBs comprising (n−1) bits are mapped to PAM2 symbols with a 1-bit parity; the PAM (m/2) symbols and the PAM2 symbols are added to generate the nDSQ coded signals.