公开(公告)号：IE67260B1

公开(公告)日：1996-03-06

申请号：IE304586

申请日：1986-11-18

Applicant: INTERDIGITAL TECH CORP

Inventor： CRITCHLOW DAVID N ,  AVIS GRAHAM M ,  EARLAM SANDRA J K ,  JOHNSON KARLE J ,  SMETANA BRUCE A ,  WASTLING GREGORY L

IPC: H04B7/26 ,  H03D3/00 ,  H03D7/16 ,  H03H17/06 ,  H03L7/095 ,  H04B1/38 ,  H04B1/50 ,  H04B7/005 ,  H04L27/152 ,  H04L27/18 ,  H04L27/22 ,  H04L27/233 ,  H04M1/00 ,  H04M1/253 ,  H04M1/725 ,  H04M11/06 ,  H04Q7/20 ,  H04Q7/38 ,  H04L27/20

Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.