Apparatus and method for WGIO phase modulation

• US 20040047434A1
• Filed: 09/10/2002
• Published: 03/11/2004
• Est. Priority Date: 09/10/2002
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Waltho, Alan E.
• Granted Patent: US 7,430,252 B2
• Time in Patent Office: Days
• US Class Current: 375/308
• CPC Class Codes: H04L 25/4908 using mBnB codes
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence

Abstract

An apparatus and method for WGIO phase modulation are described. In one embodiment, the method includes the receipt of a high-speed data stream, encoded according to an 8b/10b code. Once received, a symbol rate of the data stream is reduced by a predetermined amount. Finally, once the symbol rate is reduced, a square wave carrier is phase modulated, using the reduced data rate data stream to generate a WGIO signal having double side band spectrum distributed either side of the square wave carrier. Accordingly, in one embodiment, a 3GIO signal may be phase modulated in order to fall within a spectrum that is not currently occupied by a wireless protocol, including, for example, Wireless Local Area Network (WLAN), Wireless Wide Area Networks (WWAN), global positioning systems (GPS), or the like in order to prevent interference therebetween.

Claims

1. A method comprising:

receiving a high speed data stream;

reducing a symbol rate of the received data stream by a predetermined amount to form a reduced rate data stream; and

phase modulating a carrier wave signal having a predetermined frequency using the reduced rate data stream to form an outbound wireless third-generation (3G) input/output (I/O) (WGIO) signal having a double side band spectrum distributed to either side of the square wave carrier and contained within a predetermined range.

2. The method of claim 1, wherein reducing the symbol rate further comprises:

receiving the high speed data stream, encoded according to an 8b/10b code, at a 3GIO data rate;

decoding the received data stream using 8b/10b decoding to form a decoded binary data stream;

reforming the binary data stream to form a data symbol stream; and

clocking the data symbol stream at a fraction of the 3GIO data rate to form the reduced rate data stream.

3. The method of claim 1, wherein reducing the signal rate further comprises:

receiving the high speed data stream, encoded according to an 8b/10b code, at a 3GIO data rate;

clocking the received data stream at one-fourth of the 3GIO data rate to form the reduced rate data stream;

decoding the reduced rate stream using 8b/10b decoding to form a decoded binary data stream; and

reforming the binary data stream to form a reduced symbol rate data symbol stream as the reduced rate data stream.

4. The method of claim 1, wherein phase modulating further comprises:

generating the square wave carrier having a data rate at a predetermined fraction of the 3GIO data rate;

converting the reduced rate data stream into a multilevel analog voltage signal; and

phase modulating the square wave carrier using the analog voltage signal to form the outbound WGIO signal having a predetermined, reduced symbol rate.

5. The method of claim 3, wherein the binary data stream is reformed utilizing a unity rate differential mode encoding to restore a DC balance of the data symbol stream.

6. The method of claim 3, wherein the symbol stream is encoded according to one of a 4-ary signaling and an 8-ary signaling using quaternary phase shift keying (QPSK).

7. The method of claim 1, wherein a spectrum of the outbound signal is contained within one of a 940 MHz to 1,540 MHz band and 2,500 MHz to 5,100 MHz band.

8. The method of claim 1, wherein the received data stream is reduced by the predetermined amount of to achieve a WGIO data rate within the range of 500 Mb/s and 1.3 Gb/s;

and

wherein the square wave carrier is one of a 1,250 MHz signal and a 3,800 MHz signal.

9. The method of claim 1, further comprising:

transmitting an outbound radio frequency (RF) signal to a receiver, the outbound RF signal comprised of the outbound WGIO signal and the square wave carrier.

10. The method of claim 1:

wherein 3GIO data rate is one of 2.5 Gb/s and 5 Gb/s; and

wherein the predetermined amount is within the range of two-thirds (⅔

) and three-fourths (¾

).

11. A method comprising:

receiving a radio frequency (RF) signal comprised of a wireless third-generation (3G) input/output (I/O) (WGIO) signal;

de-modulating the WGIO signal to form an N-ary signal; and

converting the N-ary signal into a digital signal encoded within the received WGIO signal.

12. The method of claim 11, wherein de-modulating further comprises:

converting a carrier wave signal within the received RF signal into a clock signal; and

performing phase comparison between the clock signal and the WGIO signal to form the N-ary signal.

13. The method of claim 11, wherein de-modulating further comprises:

detecting a phase difference between symbols within the WGIO signal as a phase reference; and

performing differential phase detection between the phase reference and symbols within the WGIO signal to form the N-ary signal.

14. The method of claim 11, further comprising:

encoding the digital signal according to an 8b/10b code.

15. The method of claim 11, wherein the received RF signal is contained within one of a 940 MHz to 1,540 MHz band and a 2,500 MHz to 5,100 MHz band.

16. A computer readable storage medium including program instructions that direct a computer to perform one or more operations when executed by a processor, the one or more operations comprising:

receiving a high speed data stream;

reducing a symbol rate of the received data stream by a predetermined amount to form a reduced rate data stream; and

phase modulating a carrier wave signal having a predetermined frequency using the reduced rate data stream to form an outbound wireless third-generation (3G) input/output (I/O) (WGIO) signal having a double side band spectrum distributed to either side of the square wave carrier and contained within a predetermined range.

17. The computer readable storage medium of claim 16, wherein reducing the symbol rate further comprises:

receiving the high speed data stream, encoded according to an 8b/10b code, at a 3GIO data rate;

decoding the received data stream using 8b/10b decoding to form a decoded binary data stream;

reforming the binary data stream to form a data symbol stream; and

clocking the data symbol stream at a fraction of the 3GIO data rate to form the reduced rate data stream.

18. The computer readable storage medium of claim 16, wherein reducing the signal rate further comprises:

receiving the high speed data stream, encoded according to an 8b/10b code, at a 3GIO data rate;

clocking the received data stream at one-fourth of the 3GIO data rate to form the reduced rate data stream;

decoding the reduced rate data stream using 8b/10b decoding to form a decoded binary data stream; and

reforming the binary data stream to form a reduced symbol rate data symbol stream as the reduced rate data stream.

19. The computer readable storage medium of claim 16, wherein phase modulating further comprises:

generating the square wave carrier having a data rate at a predetermined fraction of the 3GIO data rate;

converting the reduced rate data stream into a multilevel analog voltage signal; and

phase modulating the square wave carrier using the analog voltage signal to form the outbound WGIO signal having a predetermined, reduced symbol rate.

20. A computer readable storage medium including program instructions that direct a computer to perform one or more operations when executed by a processor, the one or more operations comprising:

receiving a radio frequency (RF) signal comprised of a wireless third-generation (3G) input/output (I/O) (WGIO) signal;

de-modulating the WGIO signal to form an N-ary signal; and

converting the N-ary signal into a digital signal encoded within the received WGIO signal.

21. The computer readable storage medium of claim 20, wherein demodulating further comprises:

converting a carrier wave signal within the received RF signal into a clock signal; and

performing phase comparison between the clock signal and the WGIO signal to form the N-ary signal.

22. The computer readable storage medium of claim 20, wherein demodulating further comprises:

detecting a phase difference between symbols within the WGIO signal as a phase reference; and

performing differential phase detection between the phase reference and symbols within the WGIO signal to form the N-ary signal.

23. A system, comprising:

a transmitter including;

a communications interface to receive a third-generation (3G) input/output (3GIO) signal, and generate a phase modulated wireless 3GIO (WGIO) outbound signal contained within a predetermined frequency range; and

a receiver including;

a communications interface to receive a radio frequency (RF) signal including the WGIO signal and perform phase demodulation of the WGIO signal to form the 3GIO signal contained within the received RF signal.

24. The system of claim 23, wherein transmitter further comprises:

a data buffer to clock the received 3GIO data signal at a reduced data rate to form a reduced data rate signal;

an 8b/10b decoder to decode the reduced rate data signal into digital data; and

a symbol encoder to encode the digital data according to a channel code to enable RF transmission.

25. The system of claim 23, wherein the transmitter further comprises:

a phase modulator to phase modulate a carrier wave signal according to a reduced data rate signal generated from the received 3GIO signal to form the outbound WGIO signal.

26. The apparatus of claim 23, wherein the transmitter further comprises:

a phase comparator to demodulate the received WGIO signal to form an N-ary signal; and

a symbol converter to connect symbols within the N-ary signal to form the digital data encoded within the WGIO signal.

27. The system of claim 26, further comprising:

a clock regeneration to receive the carrier wave signal within the received RF signal and generate a reference clock which is provided to the phase comparator to perform demodulation using coherent phase comparison according to the reference clock.

28. The system of claim 26, wherein the phase comparator comprises a differential phase detector.