System and method for determining data rate

• US 7,583,639 B2
• Filed: 09/14/2007
• Issued: 09/01/2009
• Est. Priority Date: 05/11/1993
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Mahany, Ronald L.
• Primary Examiner(s): Trost, IV; William
• Assistant Examiner(s): Nguyen; Toan D
• Application Number:
  US11/855,660
• Publication Number:
  US 20080025378A1
• Time in Patent Office: 718 Days
• Field of Search: 370/335, 370/342, 370/441, 375/130, 375/136, 375/140, 375/147, 375/225
• US Class Current: 370/335
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04B 2201/70705 Rate detection
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0032 Without explicit signalling
• CPC Class Codes: H04L 1/0038 Blind format detection for detection of modulation format H04L27/0012
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 45/02 Topology update or discovery
• CPC Class Codes: H04L 45/48 Routing tree calculation
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 52/46 in multi hop networks, e.g. wireless relay networks
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

Described herein are systems and methods for determining data rate in a direct sequence spread spectrum system. The systems may include circuits or processors for receiving a signal that was transmitted at an unknown data rate and determining the value of the unknown data rate based on a sequence of bits that is generated from processing the signal according to a first data rate. The methods may include receiving a signal having an unknown data rate, processing the signal according to a first data rate, generating another signal that corresponds to a sequence of bits that result from the processing, and determining the value of the unknown data rate according to the sequence of bits.

Claims

1. A method of determining data rate in a direct sequence spread spectrum system, the method comprising:

receiving a signal that was transmitted at a particular data rate, wherein the particular data rate is unknown to a receiver, wherein the particular data rate is one of a high data rate or a low data rate, and wherein the high data rate is a binary multiple of the low data rate;

processing the signal according to a first data rate, thereby generating a signal corresponding to a sequence of bits; and

determining the particular data rate according to the sequence of bits.

2. The method of claim 1, wherein the method comprises initiating proper decoding mechanisms for the particular data rate.

3. The method of claim 1, wherein the particular data rate is determined according to a count of 0'"'"'s and a count of 1'"'"'s in the sequence of bits.

4. The method of claim 1, wherein the particular data rate is determined according to an occurrence of repetition in the sequence of bits.

5. The method of claim 1, wherein at least one data rate in the plurality of data rates is a binary multiple of an other data rate in the plurality of data rates.

6. The method of claim 1, wherein the particular data rate is selected according to a quality of communication on a communication channel.

7. The method of claim 1, wherein the transmission times of two different rate signals are the same duration.

8. A system for determining data rate in a direct sequence spread spectrum system, the system comprising:

one or more circuits for receiving a signal that was transmitted at a particular data rate,

wherein the particular data rate is unknown when received, wherein the particular data rate is one of a high data rate or a low data rate, and wherein the high data rate is a binary multiple of the low data rate;

wherein the one or more circuits process the signal according to a first data rate, thereby generating a signal corresponding to a sequence of bits; and

wherein the one or more circuits determine the particular data rate according to the sequence of bits.

9. The system of claim 8, wherein the one or more circuits initiate proper decoding mechanisms for the particular data rate.

10. The system of claim 8, wherein the particular data rate is determined according to a count of 0'"'"'s and a count of 1'"'"'s in the sequence of bits.

11. The system of claim 8, wherein the particular data rate is determined according to an occurrence of repetition in the sequence of bits.

12. The system of claim 8, wherein at least one data rate in the plurality of data rates is a binary multiple of an other data rate in the plurality of data rates.

13. The system of claim 8, wherein the particular data rate is selected according to a quality of communication on a communication channel.

14. The system of claim 8, wherein the transmission times of two different rate signals are the same duration.

15. A system for determining data rate in a direct sequence spread spectrum system, the system comprising:

at least one processor for receiving a signal that was transmitted at a particular data rate,

wherein the particular data rate is unknown when received, wherein the particular data rate is one of a high data rate or a low data rate, and wherein the high data rate is a binary multiple of the low data rate;

wherein the at least one processor processes the signal according to a first data rate, thereby generating a signal corresponding to a sequence of bits; and

wherein the at least one processor determines the particular data rate according to the sequence of bits.

16. The system of claim 15, wherein the at least one processor initiates proper decoding mechanisms for the particular data rate.

17. The system of claim 15, wherein the particular data rate is determined according to a count of 0'"'"'s and a count of 1'"'"'s in the sequence of bits.

18. The system of claim 15, wherein the particular data rate is determined according to an occurrence of repetition in the sequence of bits.

19. The system of claim 15, wherein at least one data rate in the plurality of data rates is a binary multiple of an other data rate in the plurality of data rates.

20. The system of claim 15, wherein the particular data rate is selected according to a quality of communication on a communication channel.

21. The system of claim 15, wherein the transmission times of two different rate signals are the same duration.

22. A method of determining data rate in a communication system, the method comprising:

receiving a direct sequence spread spectrum signal that was transmitted at a particular data rate, wherein the particular data rate is unknown to a receiver, wherein the particular data rate is one of a high data rate and a low data rate, and wherein the high data rate is a binary multiple of the low data rate;

processing the direct sequence spread spectrum signal according to the high data rate, thereby generating a despread signal corresponding to a sequence of bits;

determining the particular data rate according to an occurrence of repetition in the sequence of bits; and

initiating proper decoding mechanisms for the particular data rate.

23. The method of claim 22, wherein the particular data rate is selected according to a quality of communication on a communication channel.

24. A system for determining data rate in a communication system, the system comprising:

one or more circuits for receiving a direct sequence spread spectrum signal that was transmitted at a particular data rate, wherein the particular data rate is unknown to a receiver, wherein the particular data rate is one of a high data rate and a low data rate, and wherein the high data rate is a binary multiple of the low data rate;

said one or more circuits for processing the direct sequence spread spectrum signal according to the high data rate, thereby generating a despread signal corresponding to a sequence of bits;

said one or more circuits for determining the particular data rate according to an occurrence of repetition in the sequence of bits; and

said one or more circuits for initiating proper decoding mechanisms for the particular data rate.

25. The system of claim 24, wherein the particular data rate is selected according to a quality of communication on a communication channel.