Modulation by Linear Maximal Shift Register Sequences: Amplitude, Biphase and Complement-Phase Modulation

The report describes the use of linear-maximal shift-register sequences either to amplitude modulate (AM) or to angle modulate a sinusoidal carrier. Two cases of angle modulation are considered: biphase modulation (BM) and complement-phase modulation (CM). In biphase modulation the carrier angle swi...

Full description

Saved in:
Bibliographic Details
Main Authors: Birdsall, Theodore G, Heitmeyer, Richard M, Metzger, Kurt
Format: Report
Language:English
Subjects:
Acoustics
AMPLITUDE MODULATION
BIPHASE MODULATION
Cybernetics
LOW PASS FILTERS
MIMI PROJECT
MODULATION
PHASE MODULATION
POWER SPECTRA
SHIFT REGISTERS
SIGNAL PROCESSING
UNDERWATER SOUND
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The report describes the use of linear-maximal shift-register sequences either to amplitude modulate (AM) or to angle modulate a sinusoidal carrier. Two cases of angle modulation are considered: biphase modulation (BM) and complement-phase modulation (CM). In biphase modulation the carrier angle switches between (+ pi/2) and (- pi/2), whereas in complement-phase modulation the carrier angle switches between (+ pi/4) and (- pi/4). It is shown that the ratio of the average power to the peak power for AM is only one-half as large as for either BM or CM. On the other hand, the ratio of the carrier power to the average power for either AM or CM is one-half, but for BM this ratio is approximately zero. Finally, a replica-correlation technique for use with any of the three modulations is described.