JP2005503045A5

JP2005503045A5 -

Info

Publication number: JP2005503045A5
Application number: JP2002578663A
Authority: JP
Filing date: 2002-03-26
Publication date: 2005-12-22

Claims

A method of transmitting signals from multiple antennas,
Receiving a symbol stream at a transmitter;
Transforming the input symbol stream to generate a transform result having an N × N ′ orthogonal space-time block code and generating N first signals;
Non-zero complex weighting of at least one of the N first signals of the conversion result on a time axis to generate at least one second signal, the at least one second signal Each of which is phase shifted with respect to one of the N first signals from which it is generated , and the non-zero complex weighting step comprises at least a first predetermined hopping sequence Phase-shifting at least one of the first signals of the first hopping weight for the predetermined hopping sequence is obtained from a PSK signal point constellation having eight states and the predetermined unit in degrees Said non-zero complex weighting step wherein the hopping sequence is (0,135,270,45,180,315,90,225) ;
Each of the N first signals of the conversion result in one of the first at least one antennas, and the at least one second signal in one of the second at least one antennas Transmitting substantially simultaneously, each of the N first signals and the at least one second signal comprising M signals with M being greater than N. Method.

A device for transmitting a signal,
An input symbol stream;
A processor for converting the input symbol stream to generate a conversion result having an N × N ′ orthogonal space-time block code and generating N first signals;
At least one weighter for generating at least one second signal by performing non-zero complex weighting on at least one of the N first signals of the conversion result on a time axis, wherein the at least one weighter A second weighted signal is phase shifted with respect to one of the N first signals from which it is generated, and the non-zero complex weighting is determined by at least a first predetermined hopping sequence Phase shifting at least one of the N first signals, wherein the hopping weight for the predetermined hopping sequence is obtained from a PSK signal point constellation having eight states, the unit in degrees The at least one weighter, wherein the predetermined hopping sequence is (0,135,270,45,180,315,90,225) ;
Each of the N first signals of the conversion result at one of the first at least one antennas, and the N second signals at one of the second at least one antennas A transmitter that transmits each of the N signals at the same time, the transmitter including the N first signals and the at least one second signal, wherein M includes M signals larger than N. apparatus.

During operation of the non-zero complex weighting stage, generated from one of the N first signals and phase shifted with respect to one of the N first signals The at least one second signal includes a first second signal and at least a second second signal, and the at least first predetermined hopping sequence is a first predetermined hopping sequence (0) in units of degrees. , 135, 270, 45, 180, 315, 90 and 225) and at least the second predetermined hopping sequence is a second predetermined hopping sequence (180, 315, 90, 225, 0, 135. 270, 45).

4. The method of claim 3, wherein the first second signal is phase shifted by the first predetermined hopping sequence, and the second second signal is phase shifted by the second predetermined hopping sequence. .

Phase shift hops of the first predetermined hopping sequence and the second predetermined hopping sequence in which the first and second second signals are phase shifted during the non-zero complex weighting stage, respectively. The method of claim 4, wherein the are arranged at successive selection intervals.

6. The continuous selection interval in which phase shift hops of the first and second predetermined hopping sequences for phase shifting the first and second second signals are arranged comprises a periodic interval. the method of.

Phase shift hops of the first predetermined hopping sequence and the second predetermined hopping sequence in which the first and second second signals are phase shifted during the non-zero complex weighting stage, respectively. The method of claim 4, wherein the are arranged at random intervals.

The phase-shifted hop of the predetermined hopping sequence in which the at least one second signal is phase-shifted during an operation period of the non-zero complex weighting step is arranged at consecutive selected intervals. the method of.

9. The method of claim 8, wherein the successive selection intervals in which phase shift hops of the predetermined hopping sequence that phase shifts the at least one second signal are arranged comprise periodic intervals.

The phase-shifted hop of the predetermined hopping sequence in which the at least one second signal is phase-shifted during an operation of the non-zero complex weighting step is arranged at random intervals. Method.

The at least one second signal generated from one of the N first signals by the at least one weighter and phase shifted with respect to one of the N first signals. Comprises a first second signal and at least a second second signal, wherein the at least first predetermined hopping sequence is a first predetermined hopping sequence (0, 135, 270, 45, 180, 315, 90 and 225) and at least the second predetermined hopping sequence is from the second predetermined hopping sequence (180, 315, 90, 225, 0, 135, 270, 45) in degrees. The apparatus of claim 2.

12. The apparatus of claim 11, wherein the first second signal is phase shifted by the first predetermined hopping sequence, and the second second signal is phase shifted by the second predetermined hopping sequence. .

A selection interval in which phase shift hops of the first predetermined hopping sequence and the second predetermined hopping sequence in which the first and second second signals are phase shifted by the at least one weighter, respectively. The apparatus of claim 12 arranged in

14. The continuous selection interval in which phase shift hops of the first and second predetermined hopping sequences for phase shifting the first and second second signals are arranged comprises a periodic interval. Equipment.

Phase shift hops of the first predetermined hopping sequence and the second predetermined hopping sequence in which the first and second second signals are phase shifted by the at least one weighter, respectively, at random intervals. The device of claim 12 arranged.

The at least one weighter includes a first weighter that performs non-zero complex weighting on a first first signal among N first signals generated by the processor, and at least a second weighter. 12. The apparatus of claim 11, wherein a two weighter weights a second first signal of the N first signals generated by the processor in a non-zero complex weight.

The first weighter phase biases the first first signal according to the first predetermined hopping sequence, and the second weighter phase shifts the second first signal according to the second predetermined hopping sequence. The apparatus of claim 16, wherein the apparatus is biased.

The apparatus of claim 2, wherein phase shift hops of the predetermined hopping sequence in which the at least one second signal is phase shifted by the at least one weighter are arranged at successive selection intervals.

19. The apparatus of claim 18, wherein the successive selection intervals in which phase shift hops of the predetermined hopping sequence that phase shifts the at least one second signal are arranged comprise periodic intervals.

3. The apparatus of claim 2, wherein phase shift hops of the predetermined hopping sequence in which the at least one second signal is phase shifted by the at least one weighter are arranged at random intervals.