Communication using simultaneous orthogonal signals
First Claim
1. A method of communicating over a communications channel comprising:
- receiving a received signal that includes a remotely transmitted signal, where said remotely transmitted signal is in a given frequency band; and
transmitting, concurrent with said receiving, a locally transmitted signal in said given frequency band, where said locally transmitted signal is substantially orthogonal to said remotely transmitted signal.
3 Assignments
0 Petitions
Accused Products
Abstract
Wireless communication is improved by simultaneously transmitting signals that are orthogonal to received signals. This technique is referred to as Orthogonal Division Duplexing or ODD. Channel characteristics may be estimated based on an analysis of the received signals. Subsequently, techniques used in the transmitting of signals may be adjusted based on the estimated channel characteristics. By using interleaved pilot sub-carriers, each end of a communications link may take measurements of channel conditions. These measurements may be used to adapt the transmission techniques used in the transmitter to the measured channel conditions. Advantageously, this adaptation can occur without the delay in reporting conditions that is characteristic of traditional adaptive communications systems.
-
Citations
34 Claims
-
1. A method of communicating over a communications channel comprising:
-
receiving a received signal that includes a remotely transmitted signal, where said remotely transmitted signal is in a given frequency band; and
transmitting, concurrent with said receiving, a locally transmitted signal in said given frequency band, where said locally transmitted signal is substantially orthogonal to said remotely transmitted signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21)
-
-
17. The method of claim 16 wherein said adjusting said generating is based on said power levels.
-
22. The method of claim 21 further comprising:
-
estimating characteristics of said communications channel in said given frequency band based on said received signal; and
adjusting said transmitting based on said estimated characteristics. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
-
-
30. An apparatus for communicating over a communications channel comprising:
-
a receiver adapted to receive a received signal that includes a remotely transmitted signal, where said remotely transmitted signal is in a given frequency band; and
a transmitter adapted to transmit, concurrent with said receiving, a locally transmitted signal in said given frequency band, where said locally transmitted signal is substantially orthogonal to said remotely transmitted signal.
-
-
31. An apparatus for communicating over a communications channel comprising:
-
means for receiving a received signal that includes a remotely transmitted signal, where said remotely transmitted signal is in a given frequency band; and
means for transmitting, concurrent with said receiving, a locally transmitted signal in said given frequency band, where said transmitted signal is substantially orthogonal to said remotely transmitted signal.
-
-
32. A radio communication system comprising:
-
a base station including;
a base station receiver adapted to receive a base station received signal that includes a mobile terminal transmitted signal, where said mobile terminal transmitted signal is in a given frequency band; and
a base station transmitter adapted to transmit, concurrent with said receiving, a base station transmitted signal in said given frequency band, where said base station transmitted signal is substantially orthogonal to said mobile terminal transmitted signal;
a mobile terminal including;
a mobile terminal receiver adapted to receive a mobile terminal received signal that includes said base station transmitted signal; and
a mobile terminal transmitter adapted to transmit, concurrent with said receiving, said mobile terminal transmitted signal. - View Dependent Claims (33, 34)
-
Specification