Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service

• US 7,006,805 B1
• Filed: 01/03/2000
• Issued: 02/28/2006
• Est. Priority Date: 01/22/1999
• Status: Expired due to Term

• Current Assignee: ParkerVision, Inc.
• Original Assignee: ParkerVision, Inc.
• Inventors: Cook, Robert W., Bultman, Michael J., Sorrells, David F., Moses, Charley D. Jr., Looke, Richard C., Hamilla, Joseph M., Clements, Charles D., Silver, Gregory S.
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): CHOW, CHARLES CHIANG
• Application Number:
  US09/476,093
• Time in Patent Office: 2,248 Days
• Field of Search: 375/259, 375/316, 375/138, 375/139, 375/200, 375/260, 375/208, 375/344, 375/202, 375/346, 375/373, 375/376, 375/340, 375/229, 375/325, 375/324, 375/349, 364/138, 364/139, 455/188.1, 455/180.1, 455/339, 455/340, 455/313, 455/168.1, 455/189.1, 455/191.3, 455/285, 455/302, 455/207, 455/208, 455/260, 455/316, 455/550, 455/575, 455/264, 455/265, 455/266, 455/188.2, 455/550.1, 455/575.1, 455/318, 455/216, 455/257, 455/323, 455/324, 455/190.1, 455/161.1, 455/455, 455/516, 455/62, 455/214, 455/71, 455/215, 455/196.1, 455/151.1, 455/166.2, 329/315, 329/318
• US Class Current: 455/188.1
• CPC Class Codes: H04B 1/0057 using diplexing or multiplexing filters for selecting the desired band
• CPC Class Codes: H04B 1/0075 using different intermediate frequencied for the different bands
• CPC Class Codes: H04B 1/0082 with a common local oscillator for more than one band
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes

Abstract

A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a single band/channel mode, and a multiple band/channel mode. The receiver may form a portion of a transceiver. The transceiver may also include a transmitter. In an embodiment, the transceiver is a family radio service (FRS) unit, although the invention is not limited to this embodiment.

Claims

1. A method for communicating, comprising the steps of:

(1) identifying a radio frequency band from the electromagnetic (EM) spectrum as a band of interest;

(2) identifying a channel within said band of interest as a channel/band combination;

(3) filtering said EM spectrum thereby passing said channel/band combination;

(4) aliasing said channel/band combination according to an aliasing signal, said aliasing signal having an aliasing frequency, said aliasing frequency being a function of a clock signal, thereby generating a down-converted baseband signal including said channel/band combination; and

(5) filtering said down-converted baseband signal, thereby passing said channel as a filtered down-converted baseband signal.

2. The method of claim 1, wherein said clock signal has a clock frequency, the method further comprising the step of:

(6) adjusting said clock frequency for said channel/band combination so that said aliasing frequency is suitable for down-converting said channel/band combination.

3. The method of claim 1, further comprising the step of:

(6) decoding said filtered down-converted signal to create a decoded down-converted signal.

4. A system for communicating, comprising:

a controller that operates under the direction of a user, and that issues a first command signal and a second command signal;

a controller signal generator to generate a control signal according to said first command signal; and

a down-converting and filtering (UDF) module to filter and down-convert one or more input signals based on said control signal and according to said second command signal, said UDF to alias said filtered input signal according to an aliasing signal, said aliasing signal having an aliasing frequency, said aliasing frequency being a function of a clock signal, and thereby output a channel filtered and down-converted signal.

5. The system of claim 4, further comprising a decoder to generate a decoded output signal from said channel filtered and down-converted signal.

6. The system of claim 5, wherein said controller issues a third command signal, and wherein said decoder operates according to said third command signal.

7. The system of claim 4, wherein said control signal generator is a voltage controlled oscillator.

8. A method of communicating, comprising the steps of:

(1) identifying one or more radio frequency bands from the electromagnetic spectrum as bands of interest;

(2) identifying one or more channels within each of said bands of interest as channel/band combinations;

(3) identifying one of said channel/band combinations as a monitored channel/band combination;

(4) causing an input filter to operate with said monitored channel/band combination, and filtering an input signal using said input filter, to create a filtered signal having a frequency within said monitored channel/band combination;

(5) aliasing said filtered signal according to an aliasing signal, said aliasing signal having an aliasing frequency, said aliasing frequency being a function of a clock signal, thereby generating a down-converted baseband signal; and

(6) causing an output filter to operate with said monitored channel/band combination, and filtering said down-converted baseband signal using said output filter, thereby generating a down-converted baseband signal.

9. The method of claim 8, wherein said clock signal has a clock frequency, the method further comprising the step of:

(7) adjusting said clock frequency for said monitored channel/band combination so that said aliasing frequency is suitable for down-converting said channel/band combination.

10. The method of claim 8, further comprising the steps of:

(7) selecting a decoder to be a selected decoder, said selected decoder being configured to operate with said monitored channel/band combination; and

(8) using said selected decoder to create a decoded down-converted signal from said filtered down-converted signal.

11. The method of claim 8, further comprising the steps of:

(7) repeating steps (3) through (6).

12. A system for communicating, comprising:

an input filter module comprised of one or more input filters to filter one or more input signals so as to generate one or more filtered input signals;

a universal frequency translator to down-convert at least one of said one or more filtered input signals to generate a down-converted baseboard signal, said universal frequency translator comprising means for aliasing said filtered input signal according to an aliasing signal, said aliasing signal having an aliasing frequency, said aliasing frequency being a function of a clock signal, thereby generating said down-converted baseband signal; and

an output filter module comprised of one or more output filters to filter said down-converted baseband signal.

13. The system of claim 12, further comprising a control signal generator that outputs a control signal, wherein said universal frequency translator operates according to said control signal.

14. The system of claim 13, wherein said control signal generator is a voltage controlled oscillator.

15. The system of claim 13, further comprising a decoder module comprised of one or more decoders, wherein said decoder module decodes said filtered down-converted signal to generate a decoded output signal.

16. The system of claim 15, further comprising a controller that operates under the direction of a user, said controller to issue at least a first command signal, a second command signal, a third command signal, a fourth command signal, and a fifth command signal, wherein

said input filter module operates according to said first command signal,

said universal frequency translator operates according to said second command signal,

said control signal generator operates according to said third command signal,

said output filter module operates according to said fourth command signal, and

said decoder module operates according to said fifth command signal.