Optimal Transmit Filters for ISI Channels under Channel Shortening Detection
Författare
Summary, in English
We consider channels affected by intersymbol interference with reduced-complexity, mutual information optimized, channel-shortening detection. For such settings, we optimize the transmit filter, taking into consideration the reduced receiver complexity constraint. As figure of merit, we consider the achievable information rate of the entire system and with functional analysis, we establish a general form of the optimal transmit filter, which can then be optimized by standard numerical methods. As a corollary to our main result, we obtain some insight of the behavior of the standard waterfilling algorithm for intersymbol interference channels. With only some minor changes, the general form we derive can be applied to multiple-input multiple-output channels with intersymbol interference. To illuminate the practical use of our results, we provide applications of our theoretical results by deriving the optimal shaping pulse of a linear modulation transmitted over a bandlimited additive white Gaussian noise channel which has possible applications in the faster-than-Nyquist/time packing technique.
Avdelning/ar
Publiceringsår
2013
Språk
Engelska
Sidor
4997-5005
Publikation/Tidskrift/Serie
IEEE Transactions on Communications
Volym
61
Issue
12
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- ISI channels
- channel shortening
- waterfilling algorithms
- reduced
- complexity detection
- mismatched receivers
- MIMO-ISI
- faster-than-Nyquist
- time packing
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0090-6778