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US 4,901,319 AGranted
Transmission system with adaptive interleaving
AssigneeGeneral Electric Company
InventorDaniel P. Ross
Life of this patent
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Abstract
A transmitter has an interleaver that sets an interleaving interval in accordance with the fading characteristic of a channel and transmits in another channel. The inteleaver duration is indicated by a synchronization signal and typically is 3 to 10 times the mean time between fades (decorrelation time). If the two channels substantially differ in frequency, a scaling factor can be used. A receiver has an adaptive deinterleaver that has a deinterleaving time in accordance with the synchronization signal occurring at the interleaving interval.
Claims16
A transmitter comprising:
- receiving means for receiving a signal in a first channel having fading characteristics;
- an adaptive interleaver having a first input means for receiving a data signal having a plurality of bits, a second input means coupled to said receiving means for receiving said first channel signal, for controlling an interleaving interval in accordance with fading characteristics of said first channel, and an output means for providing all of said plurality of data signal bits in interleaved form;
- and
- means coupled to said interleaver output means for transmitting said data signal in a second channel.
1 more element
A receiver comprising:
- means for receiving an interleaved data signal of a variable interleaving interval and having a plurality of bits and a synchronization signal occurring at said interleaving interval;
- and
- an adaptive deinterleaver having a first input means coupled to said receiving means for receiving at least said data signal, a second input means for receiving at least the synchronization signal, for controlling a deinterleaving interval in accordance with the synchronization signal, and an output means for providing a deinterleaved data signal with all of said bits.
A transmission system comprising:
- first receiving means for receiving a signal in a first channel having fading characteristics;
- an adaptive interleaver having a first input means for receiving a data signal having a plurality of bits, a second input means coupled to said first receiving means for receiving said first channel signal for controlling an interleaving interval in accordance with fading characteristics of said first channel, and an output means for providing all of said plurality of data signal bits in interleaved form and a synchronization signal occurring at said interleaving interval;
- means coupled to said interleaver output means for transmitting said data signal in interleaved form in a second channel;
- second receiving means for receiving said data signal in interleaved form and said synchronization signal;
- and
- an adaptive deinterleaver having a first input means coupled to said second receiving means for receiving at least said data signal, a second input means coupled to said second receiving means for receiving at least said synchronization signal for controlling a deinterleaving interval in accordance with the synchronization signal, and an output means for providing a deinterleaved data signal with all of said bits.
3 more elements
Dependencies are inferred from the claim text.