Claims
- 1. A method of transmitting spread spectrum signals in a communication system, said method comprising the steps of:
encoding a data signal with an orthogonal function sequence to form a spread signal, wherein the length of said orthogonal function is selected from a group that includes at least one multiple of four that is not an integral power of two within a range of channels supported by said communication system; and adjusting the frequency of said spread signal to a carrier frequency.
- 2. The method according to claim 1, further comprising the step of modulating said spread signal by a PN sequence.
- 3. The method according to claim 1, wherein said orthogonal function sequence is a Hadamard code having a length of 4n.
- 4. The method according to claim 3, wherein said encoding step is performed for up to 4n data signals.
- 5. A spread spectrum communication system for transmitting a data signal comprising:
an orthogonal function encoder that combines a data signal with at least an orthogonal function sequence to form a spread signal, wherein the length of said orthogonal function is selected from a group that includes at least one multiple of four that is not an integral power of two within a range of channels supported by said spread spectrum communication system; and means for adjusting the frequency of said spread signal to a carrier frequency.
- 6. The system according to claim 5, further comprising an encoder for modulating said spread signal by a PN sequence.
- 7. The system according to claim 5, wherein said orthogonal function sequence is a Hadamard code having a length of 4n.
- 8. The system according to claim 7, wherein said encoding step is performed for up to 4n data signals.
- 9. A method for increasing the channel variability in a communication system comprising:
identifying a number of channels for said communication system; and selecting an orthogonal function sequence for encoding a data signal, wherein the length of said orthogonal function is the smallest multiple of four that is not less than said number of channels.
- 10. The method according to claim 9, wherein said orthogonal function sequence is a Hadamard code having a length of 4n.
- 11. A method of transmitting spread spectrum signals in a communication system, said method comprising the steps of:
encoding a data signal with an orthogonal function sequence to form a spread signal, wherein the length of said orthogonal function is selected from a group that includes at least one multiple of four that is not an integral power of two within a range of channels supported by said communication system; and adjusting the frequency of said spread signal to a carrier frequency.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. patent application Ser. No. 09/184,613, filed Nov. 2, 1998.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09184613 |
Nov 1998 |
US |
Child |
10155144 |
May 2002 |
US |