Method and System for a Wideband Polar Transmitter

• US 20080205549A1
• Filed: 02/28/2007
• Published: 08/28/2008
• Est. Priority Date: 02/28/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza
• Granted Patent: US 8,036,308 B2
• Time in Patent Office: Days
• US Class Current: 375/299
• CPC Class Codes: H04L 27/3405 Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
• CPC Class Codes: H04L 27/361 Modulation using a single or unspecified number of carriers, e.g. with separate stages of phase and amplitude modulation
• CPC Class Codes: H04L 27/367 using predistortion

Abstract

Certain aspects of a method and system for a wideband polar transmitter may be disclosed. Aspects of the method may include polar modulating a plurality of signals by generating a plurality of modulated intermediate frequency (IF) signals corresponding to each of a plurality of wireless communication protocols within a transmitter that handles the plurality of wireless communication protocols. The generated plurality of modulated IF signals may be upconverted to a plurality of radio frequency (RF) signals. The plurality of RF signals may be combined and the combined plurality of RF signals may be amplitude modulated.

Claims

1. A method for processing communication signals in a transmitter that handles a plurality of wireless communication protocols, the method comprising:

polar modulating a plurality of signals by generating a plurality of modulated intermediate frequency (IF) signals corresponding to each of said plurality of wireless communication protocols utilizing one or more direct digital frequency synthesizers;

upconverting said generated plurality of modulated IF signals to a plurality of radio frequency (RF) signals; and

amplitude modulating said plurality of RF signals.

2. The method according to claim 1, wherein said plurality of wireless communication protocols comprises one or more of:

a Bluetooth communication protocol, a wireless local area network (WLAN) communication protocol and a ZigBee communication protocol.

3. The method according to claim 1, comprising combining said plurality of RF signals prior to said amplitude modulating said plurality of RF signals.

4. The method according to claim 1, comprising phase modulating said generated plurality of modulated IF signals via said one or more direct digital frequency synthesizers.

5. The method according to claim 1, comprising frequency modulating said generated plurality of modulated IF signals via said one or more direct digital frequency synthesizers.

6. The method according to claim 1, comprising selecting a particular frequency channel corresponding to each of said plurality of wireless communication protocols.

7. The method according to claim 1, comprising amplitude modulating said generated plurality of modulated IF signals.

8. A system for processing communication signals in a transmitter that handles a plurality of wireless communication protocols, the system comprising:

one or more circuits that enables polar modulation of a plurality of signals by generating a plurality of modulated intermediate frequency (IF) signals corresponding to each of said plurality of wireless communication protocols utilizing one or more direct digital frequency synthesizers;

said one or more circuits enables upconversion of said generated plurality of modulated IF signals to a plurality of radio frequency (RF) signals; and

said one or more circuits enables amplitude modulation of said plurality of RF signals.

9. The system according to claim 8, wherein said plurality of wireless communication protocols comprises one or more of:

a Bluetooth communication protocol, a wireless local area network (WLAN) communication protocol and a ZigBee communication protocol.

10. The system according to claim 8, wherein said one or more circuits enables combining of said plurality of. RF signals prior to said amplitude modulation of said plurality of RF signals.

11. The system according to claim 8, wherein said one or more circuits enables phase modulation of said generated plurality of modulated IF signals.

12. The system according to claim 8, wherein said one or more circuits enables frequency modulation of said generated plurality of modulated IF signals.

13. The system according to claim 8, wherein said one or more circuits enables selection of a particular frequency channel corresponding to each of said plurality of wireless communication protocols.

14. The system according to claim 8, wherein said one or more circuits enables amplitude modulation of said generated plurality of modulated IF signals.

15. A machine-readable storage having stored thereon, a computer program having at least one code section for processing communication signals in a transmitter that handles a plurality of wireless communication protocols, the at least one code section being executable by a machine for causing the machine to perform steps comprising:

polar modulating a plurality of signals by generating a plurality of modulated intermediate frequency (IF) signals corresponding to each of said plurality of wireless communication protocols utilizing one or more direct digital frequency synthesizers;

upconverting said generated plurality of modulated IF signals to a plurality of radio frequency (RF) signals; and

amplitude modulating said plurality of RF signals.

16. The machine-readable storage according to claim 15, wherein said plurality of wireless communication protocols comprises one or more of:

a Bluetooth communication protocol, a wireless local area network (WLAN) communication protocol and a ZigBee communication protocol.

17. The machine-readable storage according to claim 15, wherein said at least one code section comprises code for combining said plurality of RF signals prior to said amplitude modulating said plurality of RF signals.

18. The machine-readable storage according to claim 15, wherein said at least one code section comprises code for phase modulating said generated plurality of modulated IF signals.

19. The machine-readable storage according to claim 15, wherein said at least one code section comprises code for frequency modulating said generated plurality of modulated IF signals.

20. The machine-readable storage according to claim 15, wherein said at least one code section comprises code for selecting a particular frequency channel corresponding to each of said plurality of wireless communication protocols.

21. The machine-readable storage according to claim 15, wherein said at least one code section comprises code for amplitude modulating said generated plurality of modulated IF signals.

22. A method for processing communication signals, the method comprising:

polar modulating a signal using a direct digital frequency synthesizer by combining an inphase component and a quadrature component of said signal; and

amplitude modulating and phase modulating a complex envelope of said combined inphase component and quadrature component of said signal.

23. A system for processing communication signals, the system comprising:

one or more circuits within a direct digital frequency synthesizer that enables polar modulation of a signal by combining an inphase component and a quadrature component of said signal; and

one or more circuits that enables amplitude modulation and phase modulation of a complex envelope of said combined inphase component and quadrature component of said signal.