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 |