METHOD FOR ESTIMATING SIGNAL-TO-NOISE RATIO OF DIG

专利名称：METHOD FOR ESTIMATING SIGNAL-TO-NOISE RATIO OF DIGITAL CARRIERS IN ANAM COMPATIBLE DIGITAL AUDIOBROADCASTING SYSTEM

发明人：GOLDSTON, Don, Roy,MATHERNE, Marcus,

M.

申请号：EP00943052.1申请日：20000622公开号：EP1190511A1公开日：20020327

摘要：A method of estimating SNR for a plurality of carriers modulated with digitalinformation, wherein the digital information includes data baud and training baud,comprising the steps of: receiving the plurality of carriers; determining a first SNR for thedata baud; determining a second SNR for the training baud; comparing at least one of thefirst and second SNRs to predetermined selection criteria; and selecting one of the firstand said second SNRs based on the comparison step. In the preferred embodiment, thecarriers are processed to produce an equalizer output for each of the carriers, and theequalizer output is processed to produce a symbol decision for each of the carriers. Theequalizer output is subtracted from the symbol decision when a data baud is received toproduce a first difference value, and the first difference value is squared to produce afirst signal to noise estimate. The equalizer output is also subtracted frompredetermined training data when a training baud is received to produce a seconddifference value, and the second difference value is squared to produce a second signal

to noise estimate. Apparatus that performs the above method is also included.

申请人：IBIQUITY DIGITAL CORPORATION

地址：8865 Stanford Boulevard,Suite 202 Columbia, MD 21045 US

国籍：US

代理机构：Luckhurst, Anthony Henry William

更多信息请下载全文后查看