System, method and apparatus for providing communications that conform to a cellular communication standard and a non-cellular communication standard

• US 8,260,279 B2
• Filed: 11/15/2009
• Issued: 09/04/2012
• Est. Priority Date: 11/15/2008
• Status: Expired due to Fees

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Kiasaleh, Kamran, Balsara, Poras T.
• Primary Examiner(s): Rampuria, Sharad
• Application Number:
  US12/618,754
• Publication Number:
  US 20100144333A1
• Time in Patent Office: 1,024 Days
• Field of Search: 455418-420, 455/550.1, 455/552.1, 455/553.1, 455/557
• US Class Current: 455/418
• CPC Class Codes: H04B 1/0003 Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain digital baseband systems H04L25/00; digital modulation/demodulation H04L27/00; CDMA H04B1/707; TDMA H04B7/2643; image transmission H04N5/00
• CPC Class Codes: H04B 1/005 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes

Abstract

The present invention provides a software defined radio transceiver that includes a programmable cellular radio front end and a programmable baseband processor. The programmable cellular radio front end is typically a digital radio frequency processor configured to support a cellular communication standard. The programmable baseband processor is connected to the digital radio frequency processor. The programmable baseband processor (a) selectively reconfigures the cellular configured digital radio frequency processor to support a non-cellular communication standard by bypassing one or more cellular communication standard specific function, and modifying one or more operating parameters to conform to the non-cellular communication standard, (b) processes input data in accordance with the non-cellular communication standard and provides the processed input data to the digital radio frequency processor for transmission, and (c) receives output data from the digital radio frequency processor and processes the received output data to obtain transmitted data.

Claims

1. A radio transceiver comprising:

a programmable cellular radio front end comprising a digital radio frequency processor configured to support a cellular communication standard;

a programmable baseband processor connected to the digital radio frequency processor, programmed with instructions stored in a memory, that when executed by the programmable baseband processor perform the steps of;

(a) selectively bypassing a set of cellular communication standard specific functions in the digital radio frequency processor;

(b) selectively modifying a set of operating parameters to conform the radio transceiver to the non-cellular communication standard;

(c) processing a set of input data in accordance with the non-cellular communication standard including mapping the set of input data to a set of symbols and selectively filtering the set of symbols in accordance with the non-cellular communication standard;

(d) providing the processed set of input data to the digital radio frequency processor for transmission;

(e) receiving a set of output data from the digital radio frequency processor;

(f) demodulating the received set of output data to obtain a set of demodulated data; and

,

(g) running a timing estimation algorithm on the set of demodulated data.

2. The radio transceiver recited in claim 1, wherein the programmable baseband processor comprises a digital signal processor.

3. The radio transceiver recited in claim 1, wherein the digital radio frequency processor and the programmable baseband processor are integrated into a single semiconductor device.

4. The radio transceiver recited in claim 1, wherein the non-cellular communication standard is P25 where P25 is the Project 25 suite of standards and further comprising an Improved Multi-Band Excitation (IMBE) vocoder connected to the programmable baseband processor.

5. The radio transceiver recited in claim 1, wherein:

the cellular communication standard comprises GSM and the non-cellular communication standard comprises P25; and

,

the digital radio frequency processor comprises a GSM digital radio frequency processor

where GSM is the Global System for Mobile Communications standard from the European Telecommunications Standards Institute and P25 is the Project 25 suite of standards.

6. The radio transceiver recited in claim 1, wherein the radio transceiver is integrated into a hand held device.

7. The radio transceiver recited in claim 1, wherein:

the cellular communication standard is selected from the group consisting of CDMA, WCDMA, EDGE, GPRS, GSM, LTE, TDMA, and OFDM; and

the non-cellular communication standard is selected from the group consisting of Bluetooth, IEEE 802.11, P25, UMTS, and a non-P25 emergency standard

where GSM is the Global System for Mobile Communications standard from the European Telecommunications Standards Institute and P25 is the Project 25 suite of standards.

8. The radio transceiver recited in claim 1, wherein the programmable baseband processor is further programmed with instructions stored in the memory, that when executed perform the steps of:

(a) performing serial-to-parallel data conversion;

(b) performing parallel-to-serial data conversion; and

,

(c) compensating for a plurality of sampling rates.

9. The radio transceiver recited in claim 1, wherein the programmable baseband processor comprises a field-programmable gate array.

10. The radio transceiver recited in claim 2, wherein the programmable baseband processor comprises a field-programmable gate array connected to the digital radio frequency processor and the digital signal processor.

11. The radio transceiver of claim 5 wherein the GSM digital radio frequency processor is programmed with a set of instructions stored in a processor memory, that when executed by the GSM digital radio frequency processor, supports P25 by performing the steps of:

(a) loading a binary file;

(b) bypassing a GSM filter;

(c) configuring a set of parameters for an all digital phase-locked loop to set a transmit frequency modulated signal;

(d) configuring a set of block parameters for a set of functional blocks of the GSM digital radio frequency processor; and

,

(e) configuring a set of multiplexers to route data between the set of functional blocks.

12. A method for providing communications that conform to a cellular communication standard and a non-cellular communication standard comprising the steps of:

providing a radio transceiver having a programmable cellular radio front end having a digital radio frequency processor;

configuring the digital radio frequency processor to support the cellular communication standard;

providing a programmable baseband processor connected to the digital radio frequency processor;

selectively reconfiguring the cellular configured digital radio frequency processor to support a communication standard chosen from the group of the non-cellular communication standard and the cellular communication standard;

performing communications conforming to the cellular communication standard by

(a) enabling a set of cellular communication standard specific functions, and modifying a set of operating parameters to conform to the cellular communication standard,

(b) processing a first set of input data in accordance with the cellular communication standard and providing the processed first set of input data to the digital radio frequency processor for transmission, and

(c) receiving a first set of output data from the digital radio frequency processor and processing the received first set of output data to obtain a first set of transmitted data; and

,

performing communications conforming to the non-cellular communication standard by

(a) reconfiguring the cellular configured digital radio frequency processor to support the non-cellular communication standard by bypassing the set of cellular communication standard specific functions, and modifying the set of operating parameters to conform to the non-cellular communication standard,

(b) processing a second set of input data in accordance with the non-cellular communication standard by mapping the second set of input data to a set of symbols and filtering the set of symbols in accordance with the non-cellular communication standard, and providing the processed second set of input data to the digital radio frequency processor for transmission, and

(c) receiving a second set of output data from the digital radio frequency processor and processing the received second set of output data by demodulating the received second set of output data to obtain a set of demodulated data

running a timing estimation algorithm on the demodulated data.

13. The method recited in claim 12, including the step of providing a digital signal processor for the programmable baseband processor.

14. The method recited in claim 12, including the step of integrating the digital radio frequency processor and the programmable baseband processor into a single semiconductor device.

15. The method recited in claim 12, including the steps:

selecting P25 as the non-cellular communication standard where P25 is the Project 25 suite of standards; and

,

providing an Improved Multi-Band Excitation (IMBE) vocoder for the programmable baseband processor.

16. The method recited in claim 12, including the steps:

selecting P25 as the non-cellular communication standard where P25 is the Project 25 suite of standards;

selecting GSM as the cellular communication standard where GSM is the Global System for Mobile Communications standard from the European Telecommunications Standards Institute;

configuring the digital radio frequency processor as a GSM digital radio frequency processor; and

configuring the GSM digital radio frequency processor to support the P25 communication standard by;

loading a binary file,

bypassing a GSM filter,

configuring a set of parameters for an all digital phase-locked loop to set a transmit frequency modulated signal,

configuring a set of block parameters for a set of functional blocks of the GSM digital radio frequency processor, and,

configuring a set of multiplexers to route data between the set of functional blocks.

17. The method recited in claim 12, including the step of integrating the radio transceiver into a hand held device.

18. The method recited in claim 12, including the steps:

selecting the cellular communication standard from the group consisting of CDMA, WCDMA, EDGE, GPRS, GSM, LTE, TDMA, and OFDM; and

selecting the non-cellular communication standard from the group consisting of Bluetooth, IEEE 802.11, P25, UMTS, and a non-P25 emergency standard

where GSM is the Global System for Mobile Communications standard from the European Telecommunications Standards Institute and P25 is the Project 25 suite of standards.

19. The method recited in claim 12, including the steps:

performing serial-to-parallel data conversion and parallel-to-serial data conversion in the programmable baseband processor; and

,

compensating for a plurality of sampling rates.

20. The method recited in claim 12, including the step of providing a field-programmable gate array for the programmable baseband processor.

21. The method recited in claim 13, including the step of providing a field-programmable gate array connected to the digital radio frequency processor and the digital signal processor.

22. A communications system utilizing a cellular communications network supporting a cellular communication standard and a non-cellular communications network supporting a non-cellular communication standard, comprising:

a set of mobile stations configured to communicate with both the cellular communications network and the non-cellular communications network; and

wherein each mobile station in the set of mobile stations comprises an antenna, a programmable cellular radio front end comprising a digital radio frequency processor configured to support the cellular communication standard, and a programmable baseband processor connected to the digital radio frequency processor, programmed with instructions stored in a memory, that when executed by the programmable baseband processor carry out the steps of;

(a) selectively communicating with the non-cellular communications network by;

i. bypassing a set of cellular communication standard specific functions, and,

ii. modifying a set of operating parameters to conform to the non-cellular communication standard;

(b) processing a set of input data in accordance with the non-cellular communication standard by mapping the set of input data to a set of symbols and filtering the set of symbols in accordance with the non-cellular communication standard;

(c) providing the processed a set of input data to the digital radio frequency processor for transmission; and

,

(d) receiving a set of output data from the digital radio frequency processor and demodulating the received set of output data to obtain a set of demodulated data.

23. A communication system utilizing a first digital RF processor (DRP) and a second DRP, the first DRP having a first programmable RF processor and a first programmable baseband processor, a second DRP having a second programmable RF processor and a second programmable baseband processor, both the first DRP and the second DRP configurable for cellular communications according to a cellular communications standard, comprising:

a radio transmitter further comprising a first memory, a first digital signal processor (DSP), a first field programmable gate array (FPGA) connected to the first DSP, the first DRP connected to the first FPGA, a first DRP memory in the first DRP and a first antenna connected to the first DRP wherein the first FPGA is configured to translate a first set of communication signals between the first DSP and the first DRP;

a radio receiver further comprising a second memory, the second DRP, a second FPGA connected to the second DRP, a second DSP connected to the second FPGA, a second DRP memory in the second DRP and a second antenna connected to the second DRP, wherein the second FPGA is configured to translate a second set of communication signals between the second DSP and the second DRP;

wherein the first memory includes a first set of instructions, that when executed by the first DSP performs the steps;

(a) receiving a set of input data into the first memory;

(b) mapping the set of input data into a set of input symbols according to a non-cellular communications standard;

(c) filtering the set of input symbols according to a filter function prescribed by the non-cellular communications standard to create a set of modulation word data; and

,

(d) transmitting the set of modulation word data to the first DRP using the first FPGA;

wherein the first memory includes a second set of instructions, that when executed by the first DRP performs the steps;

(e) loading the set of modulation word data into the first DRP memory;

(f) configuring a set of PLL parameters for a first digital phase locked loop included in the first DRP;

(g) transmitting the set of modulation word data from the first DRP memory to the first digital phase locked loop;

(h) modulating a carrier signal according to the set of modulation control words to form a modulated signal; and

,

(i) transmitting the modulated signal from the first DRP to the second DRP using the first antenna;

wherein the second DRP memory includes a third set of instructions, that when executed by the second DRP performs the steps;

(j) receiving the modulated signal from the first DSP using the second antenna;

(k) downconverting, filtering and converting the received modulated signal into a set of digital IQ data; and

,

(l) transmitting the set of digital IQ data to the second DSP using the second FPGA;

wherein the second memory includes a fourth set of instructions, that when executed by the second DSP performs the steps;

(m) demodulating the set of digital IQ data to recover the set of input data; and

,

(n) storing the recovered set of input data in the second memory.

24. The communication system of claim 23 wherein the non-cellular communication standard uses P25 compliant continuous four level FM modulation, where P25 is the Project 25 suite of standards.

25. The communication system of claim 23 wherein the set of modulation data includes a set of amplitude control words and a set of frequency control words.

26. The communication system of claim 23 wherein the non-cellular communication standard is uses P25 compliant compatible quadrature phase shift keying (CQPSK) and where P25 is the Project 25 suite of standards.

27. The communication system of claim 26 wherein the set of modulation data includes a set of amplitude control words and a set of phase control words.

28. The communication system of claim 27 wherein the first DRP includes a differentiator and wherein the step (g) includes transmitting the set of modulation word data from the first DRP memory to the differentiator, differentiating the set of modulation word data and sending the differentiated set of modulation word data to the first digital phase locked loop.