发明名称 |
HIGH SPEED SIMULCAST SYSTEM USING ADAPTIVE COMPENSATION |
摘要 |
In a simulcast communication system (26), a method and apparatus for compensating differences in propagation time, lack of synchronization in transmitters, and multipath fading to recover data transmitted to a receiving device. In a simulcast communication system (26) that comprises a plurality of transmitters (32a, 32b, 32c), a receiver (36) includes a digital signal processor (DSP) (86) that processes a demodulated received signal to adaptively compensate for changes in the channel through which a multipath signal is propagated from the transmitters to the receiver. In one embodiment, the DSP comprises a decision feedback equalizer (300). An error signal is produced by the equalizer through a comparison of the estimated symbols with symbols most likely transmitted, for use in updating filter coefficients used by the equalizer in processing the received signal. Another embodiment implements a Viterbi algorithm to make decisions of the most likely data symbols in response to estimates of the channel impulse response. Using any one of these embodiments, a linear modulated signal can be decoded to recover the data transmitted, even though the received signal has been degraded by propagation in a multipath fading channel.
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申请公布号 |
WO9508889(A1) |
申请公布日期 |
1995.03.30 |
申请号 |
WO1994US10662 |
申请日期 |
1994.09.19 |
申请人 |
GLENAYRE ELECTRONICS, INC. |
发明人 |
MARCHETTO, ROBERT, F.;STEWART, TODD, A.;HO, P., K-M. |
分类号 |
H04H20/67;(IPC1-7):H04L27/10;H03H7/30;H04B1/00 |
主分类号 |
H04H20/67 |
代理机构 |
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主权项 |
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地址 |
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