Multi-channel demodulation with blind digital beamforming
AssigneeResearch In Motion Limited
InventorsJames Reilly, Dean McArthur, Peter Edmonson
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Abstract
A system and method for receiving communication signals is provided. According to the method, a plurality of communication signals is received, each communication signal comprising one or more source signals. The plurality of communication signals are multiplexed into a multiplexed signal, which is then converted into a baseband signal. The baseband signal is sampled to produce a digital multiplexed signal comprising a plurality of samples. The samples are interpolated to generate respective interpolated digital signals, which are then subject to a blind signal separation operation to separate each of the source signals.
Claims18
A communication signal receiver, comprising:
- an array antenna having M antenna elements, each of the M antenna elements receiving a respective communication signal comprising a mixture of K source signals;
- a multiplexer for multiplexing the communication signals received by the M antenna elements into a multiplexed signal;
- a frequency converter for converting the multiplexed signal to a baseband frequency signal;
- circuitry for converting the baseband frequency signal to a digital multiplexed signal comprising a plurality of samples;
- an interpolator configured to interpolate samples in the digital multiplexed signal corresponding to each communication signal to generate respective interpolated digital signals;
- and
- a blind signal separator configured to separate the K source signals from the interpolated digital signals.
A method for receiving communication signals, comprising:
- receiving a plurality of communication signals, each communication signal comprising one or more source signals;
- multiplexing the plurality of communication signals into a multiplexed signal;
- converting the multiplexed signal to a baseband signal;
- sampling the baseband signal to produce a digital multiplexed signal comprising a plurlality of samples;
- interpolating samples in the digital multiplexed signal corresponding to each of the communication signals to generate respective interpolated digital signals;
- and
- separating each of the source signals from the interpolated digital signals using a blind signal separation operation on the interpolated digital signals.
A system for receiving communication signals, comprising:
- means for receiving a plurality of communication signals, each communication signal comprising one or more source signals;
- means for multiplexing the plurality of communication signals into a multiplexed signal;
- means for converting the multiplexed signal to a baseband signal;
- means for sampling the baseband signal to produce a digital multiplexed signal comprising a plurlality of samples;
- means for interpolating samples in the digital multiplexed signal corresponding to each of the communication signals to generate respective interpolated digital signals;
- and
- means for separating each of the source signals from the interpolated digital signals using a blind signal separation operation on the interpolated digital signals.
Dependencies are inferred from the claim text.