Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2005-11-29
2008-08-05
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C329S304000
Reexamination Certificate
active
07409015
ABSTRACT:
A cutoff rate may be used to determine an optimal binary input distribution for a communications system which operates with imperfect receiver channel state information (CSI) at the receiver. First, the cutoff rate may be evaluated and used to analyze the optimal binary input as a function of CSI quality and receiver Signal to Noise Ratio (SNR). Next, limiting distributions of BPSK and On-Off Keying (OOK) may be examined and an analytic design rule for adaptive modulation between these two inputs (as the receiver CSI changes) may be derived. The modulation scheme may provide near optimal performance by employing only these limiting distributions rather than the full spectrum of binary inputs. Finally, the results may be used to design an adaptive modulation scheme for Pilot Symbol Assisted Modulation (PSAM) systems.
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Misra Saswat
Swami Ananthram
Bocure Tesfaldet
Miller Guy M.
Stolarum Edward L.
The United States as represented by the Secretary of the Army
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