System and method for controlling combined radio signals
First Claim
1. A communication method, comprising:
- modulating, for a respective symbol time period, a set of information symbols to occupy a plurality of frequency subchannels of a communication channel, a respective signal in each respective frequency subchannel having a cyclic prefix, at least one subchannel distinct from the plurality of respective frequency subchannels occupied by the set of information symbols being occupied by at least one pilot signal, to form a composite signal within the communication channel;
applying at least one cyclic shift to the composite signal within the communication channel, to produce at least one cyclically rotated composite signal;
analyzing each respective cyclically rotated composite signal with respect to a model of a receiver for receiving the modulated set of information symbols, to determine whether the model of the receiver can receive the at least one pilot signal and a predicted bit error rate of a radio frequency communication of the respective cyclically rotated composite signal to a radio receiver corresponding to the model of the receiver; and
selecting a respective cyclically rotated composite signal based on said analyzing whether the model of the receiver can receive the at least one pilot signal and the predicted bit error rate.
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Accused Products
Abstract
A method for controlling a combined waveform, representing a combination of at least two signals having orthogonal frequency multiplexed signal components, comprising: receiving information defining the at least two signals; transforming the information defining each signal to a representation having orthogonal frequency multiplexed signal components, such that at least one signal has at least two alternate representations of the same information, and combining the transformed information using the at least two alternate representations, in at least two different ways, to define respectively different combinations; analyzing the respectively different combinations with respect to at least one criterion; and outputting a respective combined waveform or information defining the waveform, representing a selected combination of the transformed information from each of the at least two signals selected based on the analysis.
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Citations
20 Claims
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1. A communication method, comprising:
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modulating, for a respective symbol time period, a set of information symbols to occupy a plurality of frequency subchannels of a communication channel, a respective signal in each respective frequency subchannel having a cyclic prefix, at least one subchannel distinct from the plurality of respective frequency subchannels occupied by the set of information symbols being occupied by at least one pilot signal, to form a composite signal within the communication channel; applying at least one cyclic shift to the composite signal within the communication channel, to produce at least one cyclically rotated composite signal; analyzing each respective cyclically rotated composite signal with respect to a model of a receiver for receiving the modulated set of information symbols, to determine whether the model of the receiver can receive the at least one pilot signal and a predicted bit error rate of a radio frequency communication of the respective cyclically rotated composite signal to a radio receiver corresponding to the model of the receiver; and selecting a respective cyclically rotated composite signal based on said analyzing whether the model of the receiver can receive the at least one pilot signal and the predicted bit error rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication device, comprising:
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at least one modulator, configured to modulate, for a respective symbol time period, a set of information symbols to occupy a plurality of frequency subchannels of a communication channel, a respective signal in each respective frequency subchannel having a cyclic prefix, at least one subchannel distinct from the plurality of respective frequency subchannels occupied by the set of information symbols being occupied by at least one pilot signal, to form a composite signal within the communication channel; a shifter configured to apply at least one cyclic shift to the composite signal within the communication channel, to produce at least one cyclically rotated composite signal; and an automated analyzer, configured to analyze each respective cyclically rotated composite signal with respect to a model of a receiver for receiving the modulated set of information symbols, to determine whether the model of the receiver can receive the at least one pilot signal and to predict a bit error rate of a radio frequency communication of the respective cyclically rotated composite signal to a radio receiver corresponding to the model of the receiver, and to select a respective cyclically rotated composite signal based on said analyzing whether the model of the receiver can receive the at least one pilot signal and the predicted bit error rate. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A communication device, comprising:
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an input configured to receive a stream of information defining a sequence of symbols; at least one modulator, configured to modulate a set of information symbols each with a cyclic prefix and at least one pilot signal, to occupy a plurality of frequency subchannels of a communication channel, to form a composite signal within the communication channel compatible with a communication protocol; and at least one automated processor, configured to; apply at least one cyclic transformation to the composite signal within the communication channel, to produce at least one cyclically transformed composite signal; and analyze each respective cyclically transformed composite signal with respect to a receiver model emulating a receiver compatible with the communication protocol, to determine whether the receiver model can receive the sequence of signals and the at least one pilot signal and to predict a quantitative impairment of a radio frequency communication of the respective cyclically rotated composite signal to a radio receiver corresponding to the model of the receiver, and to select a respective cyclically transformed composite signal based on the analysis and the predicted quantitative impairment. - View Dependent Claims (19, 20)
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Specification