NDLI: Orthogonal Frequency Division Multiplexing (OFDM)

Content Provider	IEEE Xplore Digital Library
Author	Kabir, W.
Copyright Year	2008
Abstract	In broadband wireless system, the signal energy is scattered and reflected from objects in the environment, components of the signal arriving at the receiver are spread out over a longer period of time than is desirable. The challenge is then to provide a high-performance reliable data link that can operate with the restricted receiver power levels, severe channel fading due to multipath reflections and interfering energy from other devices nearby. With OFDM, it is possible to use a differential coding/differential detection either in the time or frequency domain depending on the condition of transmission channels with the adoption of DQPSK as a method of subcarrier modulation. This paper proposes an approximate derivation method of the bit error rate (BER) in DQPSK/OFDM system over frequency non-selective Nakagmai-Rice and Rayleigh fading channels. The validity of this equation is confirmed from the fact that the BER derived from this approximate equation coincides with that from the computer simulation, even when the system parameters, for example Doppler frequency, Rician parameter and so on, are varied. This paper will also review where OFDM is applicable and future applications.
Starting Page	178
Ending Page	184
File Size	5504729
Page Count	7
File Format	PDF
ISBN	9781424438211
DOI	10.1109/CJMW.2008.4772401
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-09-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Shanghai Univ.
Subject Keyword	Fading Rayleigh scattering ADSL Computer simulation OFDM Bit error rate Reflection CDMA Equations Frequency domain analysis BER PAPR BPSK OFDM modulation Power system reliability QAM Modulation coding DQPSK
Content Type	Text
Resource Type	Article

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Closed Form BER Expressions for BPSK OFDM Systems with Frequency Offset

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Closed form BER expressions for BPSK OFDM systems with fractional timing offset and carrier frequency offset

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Precise BER analysis of π/4-DQPSK OFDM with carrier frequency offset over frequency selective fast fading channels

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Orthogonal Frequency Division Multiplexing (OFDM)

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