A New Symbol Block Construction for CPM with Frequency Domain Equalization

Thillo, Wim Van; Nsenga, Jimmy; Lauwereins, Rudy; Ramon, V.; Bourdoux, André; Horlin, François

doi:10.1109/icc.2008.811

Cited by 16 publications

(23 citation statements)

References 11 publications

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“…However, as a CPM signal contains memory, an intrafix of K data-dependent symbols has to be inserted in each block, in addition to the CP. This was shown in [10] but in this paper we follow a slightly different procedure, which is described in detail in [18]. As shown in Fig.…”

Section: Block-based Cpm and The Need Of An Intrafixmentioning

confidence: 98%

Low-complexity linear frequency domain equalization for continuous phase modulation

Thillo

Horlin

Nsenga

et al. 2009

IEEE Trans. Wireless Commun.

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Abstract-In this paper, we develop a new low-complexity linear frequency domain equalization (FDE) approach for continuous phase modulated (CPM) signals. As a CPM signal is highly correlated, calculating a linear minimum mean square error (MMSE) channel equalizer requires the inversion of a nondiagonal matrix, even in the frequency domain. In order to regain the FDE advantage of reduced computational complexity, we show that this matrix can be approximated by a block-diagonal matrix without performance loss. Moreover, our MMSE equalizer can be simplified to a low-complexity zero-forcing equalizer. The proposed techniques can be applied to any CPM scheme. To support this theory we present a new polyphase matrix model, valid for any block-based CPM system. Simulation results in a 60 GHz environment show that our reduced-complexity MMSE equalizer significantly outperforms the state of the art linear MMSE receiver for large modulation indices, while it performs only slightly worse for small ones.Index Terms-Continuous phase modulation (CPM), frequency domain equalization (FDE), minimum mean square error (MMSE) equalization, complexity reduction, polyphase representation

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Section: Block-based Cpm and The Need Of An Intrafixmentioning

confidence: 98%

Low-complexity linear frequency domain equalization for continuous phase modulation

Thillo

Horlin

Nsenga

et al. 2009

IEEE Trans. Wireless Commun.

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“…Therefore, it is desirable to minimize the length of the intra-fix while still satisfying the required constraints. The number of required intra-fix symbols for single-h CPM depends only on the denominator of the rational modulation index [8]. However, for multi-h CPM, the required number of intra-fix symbols per block depends both on the numerators and the common denominator of the indices, and is typically less than that required for a single-h CPM scheme having the same denominator.…”

Section: Introductionmentioning

confidence: 97%

“…The concept first introduced in [5] used two such segments, one of which was shown to be redundant in [7]. Later [8] introduced the term intra-fix, and devised an ingenious approach that eliminated the dependence of the intra-fix on the symbols of the previous blocks. The problem of intra-fix insertion has not been addressed previously in the literature for multi-h CPM.…”

Section: Introductionmentioning

confidence: 99%

“…This is satisfied by insertion of an extra segment per block, called a Cyclic Prefix (CP). However, the insertion of a CP alone does not guarantee a circulant channel matrix for CPM waveforms owing to their continuous phase requirement [5]- [8]. A segment typically consisting of a few symbols, called a tail [5] or an intra-fix [8], must be inserted in the block to force the transmitter to reach the same state it had at the start of the block.…”

Section: Introductionmentioning

confidence: 99%

“…However, the insertion of a CP alone does not guarantee a circulant channel matrix for CPM waveforms owing to their continuous phase requirement [5]- [8]. A segment typically consisting of a few symbols, called a tail [5] or an intra-fix [8], must be inserted in the block to force the transmitter to reach the same state it had at the start of the block. The concept first introduced in [5] used two such segments, one of which was shown to be redundant in [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Symbol block construction for frequency domain equalization of multi-h CPM

Saleem

Stuber

2012

2012 IEEE International Conference on Communications (ICC)

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This paper considers the construction of a symbol block to generate a cyclic multi-h continuous phase modulated (CPM) signal so as to permit frequency domain equalization (FDE) at the receiver. Like single-h CPM, the memory inherent in a multi-h CPM waveform requires an intra-fix in each transmitted block. We propose a novel procedure that determines the intra-fix symbols, such that the intra-fix length is minimized. The constraints on the required intra-fix symbols are shown to form a set of Linear Diophantine Equations (LDEs). The proposed procedure is applied to a dual-h CPM scheme.

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Iterative data detection and channel estimation for space‐time block coded continuous phase modulation over flat fading channels

Wang

Abeysekera

2014

IET Communications

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A New Symbol Block Construction for CPM with Frequency Domain Equalization

Cited by 16 publications

References 11 publications

Low-complexity linear frequency domain equalization for continuous phase modulation

Low-complexity linear frequency domain equalization for continuous phase modulation

Symbol block construction for frequency domain equalization of multi-h CPM

Iterative data detection and channel estimation for space‐time block coded continuous phase modulation over flat fading channels

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