Cosine-modulated filterbanks based on extended Gaussian functions

Siohan, Pierre; Roche, C.

doi:10.1109/78.875463

Cited by 123 publications

(78 citation statements)

References 10 publications

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“…To keep the same behavior across frequency for the Hm,n process as for the Hm,n process we assume that the Em,n has the same statistical properties as Hm,n. Hence Em,n satisfies (6) - (9). A statistical model for imperfect CSI is used as it allows a comparison of IOTA-OFDM and CP-OFDM under exactly the same conditions.…”

Section: Discussionmentioning

confidence: 99%

“…[6], [9]. In its general form, the OFDM/OQAM baseband equivalent signal can be formed by summing N OQAM modulations.…”

Section: A Iota-ofdm Transmitter Modelmentioning

confidence: 99%

“…Using the method presented in [9], [11] the coefficients for the orthogonal pulse 90 (t) can be obtained. The Gaussian pulse, 9(t), is orthogonalized using,…”

Section: Appendixmentioning

confidence: 99%

“…In order to overcome the problems associated with conventional OFDM, the IOTA approach has been proposed [9], [10], [11]. OFDM/OQAM employing IOTA, as in [4], [5], [6], [7], is a unique approach.…”

Section: Introductionmentioning

confidence: 99%

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A comparison of CP-OFDM with IOTA-OFDM under typical system imperfections

Kongara

Smith

Mann³

2008

IET Seminar Digests

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Abstract-In this paper we compare the performance of OFDM with a cyclic prefix (CP) and isotropic orthogonal transform algorithm (IOTA) OFDM without cyclic prefix under typical system imperfections such as channel estimation errors and frequency offset. The IOTA-OFDM system is based on offset quadrature amplitude modulation (OQAM) and promises an increased immunity to both inter-carrier interference (ICI) and inter-symbol interference (lSI). Moreover, IOTA-OFDM does not require a CP which makes it spectrally more efficient. Our simulation results show that compared to CP-OFDM, IOTA-OFDM is spectrally efficient and more tolerant to interference and frequency offset. Imperfect channel estimation may reduce the gains of IOTA-OFDM but considerable throughput advantages are still obtained for a fixed HER.

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Section: Discussionmentioning

confidence: 99%

“…[6], [9]. In its general form, the OFDM/OQAM baseband equivalent signal can be formed by summing N OQAM modulations.…”

Section: A Iota-ofdm Transmitter Modelmentioning

confidence: 99%

“…Using the method presented in [9], [11] the coefficients for the orthogonal pulse 90 (t) can be obtained. The Gaussian pulse, 9(t), is orthogonalized using,…”

Section: Appendixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A comparison of CP-OFDM with IOTA-OFDM under typical system imperfections

Kongara

Smith

Mann³

2008

IET Seminar Digests

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“…Moreover, one of the key aspects of the FBMC/NOFDM-based system design is the proper definition of the transmit and the receive pulse shapes (filters), denoted as g(t) and q(t), respectively. Various pulse-shapes have been derived for FBMC in the rich literature, such as Isotropic Orthogonal Transform Algorithm pulse (IOTA) [14], Hermitian, Enhanced Gaussian Function (EGF) pulse [11], etc. Although these pulses are often designed in such a way that the orthogonality is ensured, one of the drawbacks of the practical implementation of the FBMC/NOFDM-based system in practice is the presence of the residual self-interference due to the impairments of electronic elements, finite representation of the pulses etc.…”

mentioning

confidence: 99%

Mercury-Waterfilling for Generalized Multicarrier Signaling

Kliks

2013

Wireless Pers Commun

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Orthogonal Frequency Division Multiplexing is often treated as the promising technique for next wireless or wired communication systems. Beside its great advantages, orthogonal frequency division multiplexing has also some weaknesses, such as high out-ofband emission or high peak-to-average power ratio, which become the basis for investigation on new transmission techniques. In this paper the application of the so-called generalized multicarrier (GMC) signaling is considered as a good solution for application in future systems, especially for cognitive-radio applications. It is characterized by high flexibility and adaptability of its parameters, thus allowing for e.g. low out-of-band emission. In this work the possibilities of application of link adaptation techniques have been analyzed, with the particular attention put on the mercury-waterfilling principle. Two approaches of application of this procedure in GMC systems have been proposed and analyzed by means of computer simulations.

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