Transmission method, transmitter, reception method, and...

Details Transmission method, transmitter, reception method, and... Transmission method, transmitter, reception method, and...

2006-07-18

2009-08-25

Vo, Nguyen (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S314000, C455S324000

Reexamination Certificate

active

07580689

ABSTRACT:
For the purpose of efficient transmission based on the UWB system, first and second baseband waveforms are generated at a cycle equivalent to an integral multiple of a carrier to have a specified phase difference from each other. The first baseband waveform is multiplied by the carrier and a first transmission data sequence to acquire a first transmission waveform. The second baseband waveform is multiplied by a phase shifted carrier and a second transmission data sequence to acquire a second transmission waveform. The first transmission waveform is mixed with the second transmission waveform to acquire a transmission signal. The transmission signal is transmitted as a π/2 shift BPSK signal to transmit a UWB signal. Selecting the baseband waveforms and the carrier makes it possible to configure the transmission band and easily provide division multiplexing transmission.

REFERENCES:
patent: 4817116 (1989-03-01), Akaiwa et al.
patent: 5148127 (1992-09-01), Cheon
patent: 06-244882 (1994-09-01), None
patent: 07-177057 (1995-07-01), None
Kumud Kashyap et al., “A study on the performance of the CDMA system using π/4-shift QPSK and π/2-shift BPSK,” Technocal Report of IEICE, vol. 95, No. 594, Mar. 1996, pp. 95-100.

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