Apparatus for providing increased data rates within existing mod

Details Apparatus for providing increased data rates within existing mod Apparatus for providing increased data rates within existing mod

1997-09-05

2000-09-12

Chin, Stephen

Pulse or digital communications

Systems using alternating or pulsating current

Angle modulation

375283, 375308, 375331, H04L 2710

Patent

active

061188271

ABSTRACT:
A method for increasing data rates within a modulated signal is disclosed. Initially, a first and second bit streams are interleaved together to form an interleaved output bit stream. The interleaved output bit stream is modulated in a manner such that upon demodulation of the interleaved output bit stream according to an FSK modulation scheme only the first bit stream is recovered, and upon demodulation of the interleaved output bit stream according to a second modulation scheme, both the first and second bit streams are recovered.

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N. Seshadri, et al. Multi-Level Block Coded Modulations with Unequal Error Protection for the Rayleigh Fading Channel, European Transactions on Telecommunications and Related Technologies, vol. 4, No. 3, May 1, 1993, pp. 325-334, XP000385758.

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