发明名称 |
Order recursive lattice decision feedback equalization for digital cellular radio |
摘要 |
A received time division multiple access (TDMA) signal having a time slot comprised of a plurality of symbols including at least one sequence of synchronizing symbols and a plurality of data symbols is demodulated by adaptively filtering the received signal to minimize inter-symbol interference due to an effect of channel signal propagation delay. The adaptive filtering step is performed by processing the received signal with a multi-stage lattice decision feedback equalizer having (M=N1-N2) stages followed by (N2-1) two-dimensional stages. A metric is next formed for each of the stages in accordance with a predetermined mathematical relationship between the output signals of each of two stages. A plurality of the formed metrics are next accumulated over a plurality of time slots. A number of stages are then recursively determined for the lattice decision feedback equalizer for use during the next time slot by comparing, to a threshold value, the difference between the values of two accumulated metrics.
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申请公布号 |
US5249205(A) |
申请公布日期 |
1993.09.28 |
申请号 |
US19910753579 |
申请日期 |
1991.09.03 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
CHENNAKESHU, SANDEEP;NARASIMHAN, ANAND;ANDERSON, JOHN B. |
分类号 |
H03K5/159;H04L25/03 |
主分类号 |
H03K5/159 |
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