发明名称 Phase Noise Tracking and Reduction
摘要 A group of data symbols for a current block of data symbols in multiple blocks received over a communication channel is equalized, based on a pilot block, to generate a group of equalized symbols. The group of equalized symbols is de-rotated as a function of a current phase estimate to determine initial de-rotated equalized symbols. The phase estimate is an estimate of phase caused by noise for blocks previous to the current block. Additionally, a phase metric is calculated from real and imaginary parts of the initial de-rotated equalized symbols, wherein the phase metric estimates phase caused by noise for the current block. The current phase estimate is updated with the phase metric. The initial de-rotated equalized symbols are de-rotated by the phase metric to determine final equalized and de-rotated symbol estimates. The final equalized and de-rotated symbol estimates are output. Apparatus, methods, and computer program products are disclosed.
申请公布号 US2017026203(A1) 申请公布日期 2017.01.26
申请号 US201615283654 申请日期 2016.10.03
申请人 Nokia Solutions and Networks Oy 发明人 Thomas Timothy;Cudak Mark
分类号 H04L25/03;H04L27/22 主分类号 H04L25/03
代理机构 代理人
主权项 1. A method, comprising: equalizing by an apparatus, based on a pilot block, a group of data symbols for a current block of data symbols in a plurality of blocks received over a communication channel to generate a group of equalized symbols; de-rotating by the apparatus the group of equalized symbols as a function of a phase estimate to determine initial de-rotated equalized symbols, wherein the phase estimate is an estimate of phase caused by noise for blocks previous to the current block of data symbols; and calculating by the apparatus a phase metric from real and imaginary parts of the initial de-rotated equalized symbols in the group, wherein the phase metric estimates phase caused by noise for the current block; wherein the phase metric is calculated as a function of a sum of a plurality of products of the absolute value of the real and the imaginary parts of the initial de-rotated equalized symbols.
地址 Espoo FI