Wireless repeater with arbitrary programmable selectivity
The invention relates to wireless repeater systems and methods. In embodiments, such systems and methods involve receiving a wireless transmission signal; and processing the wireless transmission signal using a digital signal processing facility (DSP); wherein the DSP is adapted to filter at least one sub-band of the wireless transmission signal using a digital bandpass filter.
1. A method of extending a signal in cell site infrastructure applications, the method comprising:
processing, for retransmission, a received signal through a digital signal processor and a composite bandpass filter for multiple sub-bands, wherein the composite bandpass filter includes a plurality of finite impulse response (FIR) filters, the plurality of FIR filters being arranged in parallel,
wherein the processing further includes:
producing, with a Hilbert transform, a quadrature output in quadrature with an inphase output of at least one of the plurality of FIR filters,
interpolating the quadrature output and the inphase output to produce interpolated outputs, and
producing, with an up-conversion mixer, an upconverted signal based at least in part on the interpolated outputs.
2. The method of claim 1 wherein the processing includes filtering with an image noise filter.
3. The method of claim 1 further comprising processing for retransmission with a simplified frequency architecture.
4. The method of claim 3 further comprising processing for retransmission with a high reference oscillator frequency.
5. The method of claim 3 , wherein the retransmission is single sideband transmission.
6. The method of claim 1 wherein the processing includes adaptive cancellation of a transmitter wrap-around leakage.
7. The method of claim 6 wherein the adaptive cancellation includes an adaptively weighted transmission sample.
8. A method comprising:
receiving one or more external composite signals with a donor antenna;
amplifying and re-radiating a downlink of the one or more external composite signals with a coverage antenna;
receiving one or more internal composite signals with the coverage antenna;
amplifying and re-radiating an uplink of the one or more internal composite signals with the donor antenna;
summing output coefficients of a plurality of individual sub-band filters to generate composite filter coefficients for a composite multiple sub-band bandpass filter; and processing the one or more composite signals of the downlink and the uplink with a digital signal processor and the composite multiple sub-band bandpass filter, wherein the composite multiple sub-band bandpass filter includes the plurality of individual sub-band filters, the plurality of individual sub-band filters being arranged in parallel,
producing, using a Hilbert transform, a quadrature output in quadrature with an inphase output of the composite multiple sub-band bandpass filter;
interpolating the quadrature output and the inphase output producing interpolated outputs, and
converting for retransmission, based at least in part on the interpolated outputs.
9. The method of claim 8 wherein the one or more composite signals of the downlink and the uplink are received and transmitted by one or more mobile handsets.
10. The method of claim 8 wherein the coverage antenna is a single antenna.
11. The method of claim 8 wherein the coverage antenna is an array of antennas with an associated feed structure.
12. The method of claim 8 wherein the processing includes adaptive cancellation of a transmitter wrap-around leakage.
13. The method of claim 8 , wherein each individual sub-band filter is processed by weighting a sample of a corresponding individual sub-band signal with one of a plurality of tap weight coefficients at each of a plurality of time-shifted stages, each of the plurality of tap weight coefficients sized based on a count of the plurality of individual sub-band filters, wherein a count of the plurality of time-shifted stages is independent of a count of the individual sub-bands.
14. The method of claim 12 wherein the adaptive cancellation includes an adaptively weighted transmission sample.
15. A method of extending a signal in wireless telephony services, the method comprising:
bi-directionally extending wireless telephony signals through a digital signal processor and a composite multiple sub-band bandpass filter;
producing, using a Hilbert transform, a quadrature output in quadrature with an inphase output of the composite multiple sub-band bandpass filter;
interpolating the quadrature output and the inphase output to produce interpolated outputs, and
converting for retransmission, based at least in part on the interpolated outputs, wherein the composite multiple sub-band bandpass filter includes a plurality of finite impulse response (FIR) filters, the plurality of FIR filters being arranged in parallel, and wherein the composite multiple sub-band bandpass filter is configured to pass at least two assigned sub-bands and reject non-assigned sub-bands, wherein the at least two assigned sub-bands include at least two non-contiguous sub-bands.
16. The method of claim 15 further comprising selecting one or more of the at least two assigned sub-bands using a user interface.
17. The method of claim 15 wherein the wireless telephony signals are bi-directionally extended between a donor antenna and a coverage antenna.
18. The method of claim 17 wherein the donor antenna and the coverage antenna are outside.
19. The method of claim 17 wherein the coverage antenna is an array of antennas with an associated feed structure including a portion of which is inside.