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BFSK design using system generator 1.0

  Date Added: August 17, 2013  |  Visits: 262

BFSK design using system generator

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The transmitter is the combination of three distinct parts: the preamble, the data input and the modulation circuitry. The data is transmitted in blocks of 120 bits. An eight bit preamble with pattern 10101001 is attached in front of every packet to facilitate packet synchronization at the receiver. For simulation purposes, Simulinkd-deOaos blocks d-de?From Workspaced-deOao and d-de?To Workspaced-deOao were used to supply the design with input bits and store them, respectively. The results were also visually verified at each stage using d-de?Scoped-deOao blocks. Non-coherent BFSK. The choice of a Non-Coherent (NC) receiver design was made to eliminate any need for an extra circuit that would extract the phase information from the received signal. The receiver consists of the following subsystems: the two Correlators, the Decision Circuit, the Timing Circuit, the two Non-Coherent Matched Filters and the Decoding Subsystem. The Correlators and the Timing Circuit form the feedback path and the Non-Coherent Matched Filters and the Decoding Subsystem form the feed-forward path. The mixers are parts of both paths and are shown explicitly in the figure. The d-de?Relationald-deOao block compares the non-coherent matched filtersd-deOao outputs and decides the value of the received bit. The circuit designed closely matches the theoretical diagram found in any introductory textbook, with the addition of a time synchronization circuit and a Decode Subsystem.

Requirements: No special requirements
Platforms: Matlab
Keyword: Circuit Consists Correlators Decision Decoding Extract Feedback Feedforward Filters Information Matched Mixers Paths Phase Received Signal Subsystem Subsystems Timing
Users rating: 0/10

License: Freeware Size: 61.44 KB
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