Parallel dataword modulation scheme

Details Parallel dataword modulation scheme Parallel dataword modulation scheme

1994-06-29

1996-03-05

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

375279, H04L 2700

Patent

active

054973970

ABSTRACT:
Data words are transmitted over a radio channel with a novel modulation scheme which transmits data in parallel. An entire data word is modulated by separating a carrier frequency band into a number of discrete `tones`. Tone T.sub.1 is set to a zero phase shift in order to provide timing in synchronization of the signal. The remaining tones are phase shifted according to a predetermined convention, thereby encoding the bits of the data word. The phase shifts for all tones comprises a spectrum which is transmitted to a receiver simultaneously. A receiver monitors tone T.sub.1 for zero phase shifts to provide synchronization of the signal. The remaining tones are analyzed for their phase shift to provide bits which are assembled into a transmitted data word. Since the bits are transmitted in parallel as the data word, as opposed to conventional modulation schemes, the throughput is increased.

REFERENCES:
patent: 5351272 (1994-09-01), Abraham

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