Transmitting station for wireless telephone system with diversity transmission and method
First Claim
1. A transmitting station for communicating data in a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of PN spread spectrum signals comprising:
- a first encoder for spreading and modulating data with a first PN code to form a first PN spread spectrum modulated data signal carrying the data;
a second encoder for spreading and modulating the same data with a second PN code which is different than said first PN code to form a second PN spread spectrum modulated data signal carrying the data; and
a transmitter for transmitting said first and second PN spread spectrum modulated data signals from the transmitting station.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmitting station for communicating data in a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of PN spread spectrum signals. The transmitting station spreads and modulates the data with a plurality of different PN codes to form a plurality of PN spread spectrum modulated data signals. A transmitter transmits the PN spread spectrum modulated data signals from the transmitting station. Preferably, the transmitter includes multiple spaced apart antennas from which the respective PN spread spectrum modulated data signals are transmitted. Preferably, the transmitter is configured to transmit the PN spread spectrum modulated data signals as a plurality of time slotted PN spread spectrum signals, each PN spread spectrum modulated data signal in a different time slot. In one embodiment, a PN code generator operates in conjunction with the forming the PN spread spectrum modulated data signals during different time intervals corresponding to the different time slots so that the PN codes used to spread the data are part of a PN code sequence produced by the PN code generator without resetting.
-
Citations
26 Claims
-
1. A transmitting station for communicating data in a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of PN spread spectrum signals comprising:
-
a first encoder for spreading and modulating data with a first PN code to form a first PN spread spectrum modulated data signal carrying the data;
a second encoder for spreading and modulating the same data with a second PN code which is different than said first PN code to form a second PN spread spectrum modulated data signal carrying the data; and
a transmitter for transmitting said first and second PN spread spectrum modulated data signals from the transmitting station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of PN spread spectrum signals, a method for communicating data from a transmitting station, said method comprising:
-
spreading and modulating data with a first PN code to form a first PN spread spectrum modulated data signal carrying the data;
spreading and modulating the same data with a second PN code which is different than said first PN code to form a second PN spread spectrum modulated data signal carrying the data; and
transmitting said first and second PN spread spectrum modulated data signals from the transmitting station. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
spreading and modulating the data with a third PN code which is different than said first and second PN codes to form a third PN spread spectrum modulated data signal;
transmitting said third PN spread spectrum modulated data signal from the transmitting station in a third time slot different from said first and second time slots from a third antenna spaced apart from said first and second antennas.
-
-
23. A method in accordance with claim 18, further comprising:
-
spreading and modulating the data with a third PN code which is different than said first and second PN codes to form a third PN spread spectrum modulated data signal;
transmitting said third PN spread spectrum modulated data signal from the transmitting station.
-
-
24. A method in accordance with claim 23, wherein the transmitting said first PN spread spectrum modulated data signal from the transmitting station is from a first antenna, the transmitting said second PN spread spectrum modulated data signal from the transmitting station is from a second antenna spaced apart from said first antenna and the transmitting said a third PN spread spectrum modulated data signal from the transmitting station is from a third antenna spaced apart from said first and second antennas.
-
25. A method in accordance with claim 24, wherein said first, second and third PN codes are part of a PN code sequence produced by a PN code generator without resetting.
-
26. A method in accordance with claim 18, wherein said first and second PN codes are part of a PN code sequence produced by a PN code generator without resetting.
Specification