Method and apparatus for mitigating fading in a communication system
AssigneeTexas Instruments Incorporated
InventorShreharsha Rao
Life of this patent
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Abstract
Systems and methods are provided for mitigating fading in a wireless communication system. A wireless communication, having an associated communication channel, includes a coder that provides coding to a digital input signal. A block interleaver has an associated interleaving depth and interleaving span. The associated interleaving span is selected as to achieve a target value for a normalized fading bandwidth associated with the channel. The block interleaver interleaves the coded input signal. A frequency hopping transmitter broadcasts the interleaved signal at a set of frequencies associated with the channel.
Claims20
A wireless communication system, having an associated communication channel, comprising:
- a coder that provides convolutional coding to a digital input signal;
- a block interleaver, having an associated interleaving depth and interleaving span, that interleaves the coded input signal, the associated interleaving span being selected as a function of a target value for a normalized fading bandwidth associated with the channel;
- and
- a frequency hopping transmitter that broadcasts the interleaved signal at a set of frequencies associated with the channel.
A wireless communication system, having an associated communication channel, comprising:
- a frequency dehopper that recovers an interleaved signal from a frequency hopped signal broadcast on the communication channel;
- a deinterleaver that reconstructs an error coded input signal from the recovered interleaved signal according to an interleaving depth and interleaving span associated with the interleaved signal, the associated interleaving span being selected as to approximate a target value for a normalized fading bandwidth associated with the channel;
- and
- a decoder that retrieves a digital signal from the reconstructed error coded input signal.
A method for mitigating fading in a communication channel comprising:
- determining an interleaving span for a digital transmission according to a desired target value for a normalized fading bandwidth of the communication channel;
- error coding a digital input signal;
- interleaving the error coded signal according to the determined interleaving span and;
- transmitting the interleaved signal as a frequency hopped signal across a plurality of hopping frequencies associated with the channel from a first transceiver unit;
- dehopping the frequency hopped signal at a second transceiver unit to recover the interleaved signal;
- deinterleaving the interleaved signal to reconstruct the error coded signal;
- and
- decoding the error coded signal to retrieve the digital input signal.
Dependencies are inferred from the claim text.