Theory and Applications of OFDM and CDMA

Schulze, Henrik; Lüders, Christian

doi:10.1002/0470017406

Cited by 284 publications

(237 citation statements)

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“…A set of functions are reciprocally orthogonal if they meet the conditions in (1). If any two different functions within the set are multiplied, and integrated over a symbol period, the result is zero [2].…”

Section: A Basics Of Ofdmmentioning

confidence: 99%

“…(2) where f a is the carrier spacing, M is the number of carriers and T is the symbol period. Since the highest frequency component is Mf a , the transmission bandwidth is also Mf a .…”

Section: A Basics Of Ofdmmentioning

confidence: 99%

“…3 indicates, an OFDM wireless communication system consists of three major parts: transmitter, channel, and receiver [2], [3], [8].…”

Section: B Ofdm Wireless Communication Systemmentioning

confidence: 99%

“…6. Deinterleaver -at the receiver, a deinterleaver is employed to undo the effect of the interleaver in the transmitter [1], [2]. In order to ensure proper deinterleaving, the interleaver and deinterleaver must be synchronized.…”

Section: Fig 4 Block Diagram Of a Digital Modulatormentioning

confidence: 99%

“…Channel Decoder -the channel decoder attempts to reconstruct the original information sequence from knowledge of the code used by the channel encoder and the redundancy in the received data [1], [2]. As with deinterleaving, decoding requires synchronization.…”

Section: Fig 4 Block Diagram Of a Digital Modulatormentioning

confidence: 99%

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Narrowband Interference Suppression in Wireless OFDM Systems

Nikolova

Iliev

Ovtcharov

et al. 2009

African Journal of ICT

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Abstract-Signal distortions in communication systemsoccur between the transmitter and the receiver; these distortions normally cause bit errors at the receiver. In addition interference by other signals may add to the deterioration in performance of the communication link. In order to achieve reliable communication, the effects of the communication channel distortion and interfering signals must be reduced using different techniques. The aim of this paper is to introduce the fundamentals of Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Access (OFDMA), to review and examine the effects of interference in a digital data communication link and to explore methods for mitigating or compensating for these effects.

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Section: A Basics Of Ofdmmentioning

confidence: 99%

“…(2) where f a is the carrier spacing, M is the number of carriers and T is the symbol period. Since the highest frequency component is Mf a , the transmission bandwidth is also Mf a .…”

Section: A Basics Of Ofdmmentioning

confidence: 99%

“…3 indicates, an OFDM wireless communication system consists of three major parts: transmitter, channel, and receiver [2], [3], [8].…”

Section: B Ofdm Wireless Communication Systemmentioning

confidence: 99%

Section: Fig 4 Block Diagram Of a Digital Modulatormentioning

confidence: 99%

Section: Fig 4 Block Diagram Of a Digital Modulatormentioning

confidence: 99%

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Narrowband Interference Suppression in Wireless OFDM Systems

Nikolova

Iliev

Ovtcharov

et al. 2009

African Journal of ICT

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Unitary Design of Radar Waveform Diversity Sets

Haykin¹,

Liu²

2010

Handbook on Array Processing and Sensor Networks

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In this work, multiple radar waveforms are simultaneously transmitted, emitted from different "virtual" antennas. The goal is to process the returns in such a way that the overall ambiguity function is a sum of ambiguity functions better approximating the desired thumbtack shape. A 4×4 example involves two spatially separated antennas with each able to transmit and receive simultaneously on two different polarizations. The 4×4 unitary design dictates the scheduling of the waveforms over the four virtual antennas over four PRIs (Pulse Repetition Intervals), and how the matched filtering of the returns over four PRIs is combined in to achieve both perfect separation (of the superimposed returns) and perfect reconstruction. Perfect reconstruction means the sum of the time-autocorrelations associated with each of the four waveforms is a delta function. Conditions for both perfect separation and perfect reconstruction are developed, and a variety of waveform sets satisfying both are presented.

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Turbo Equalization

Regalia

2010

Adaptive Signal Processing

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Theory and Applications of OFDM and CDMA

Cited by 284 publications

References 0 publications

Narrowband Interference Suppression in Wireless OFDM Systems

Narrowband Interference Suppression in Wireless OFDM Systems

Unitary Design of Radar Waveform Diversity Sets

Turbo Equalization

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