Relying on space-time linearly precoded orthogonal frequency-division multiple access (OFDMA) and exploiting both transmit and receive antenna diversity, we design herein multirate transceivers that guarantee deterministic symbol recovery with diversity gains regardless of the (possibly unknown) frequency-selective finite impulse response (FIR) channels and multiuser interference. Our approach ...

Currently, Communication via Diffusion (CvD) is one of the most prominent systems in nanonetworks. In this paper, we evaluate the effects of two major interference sources, Intersymbol Interference (ISI) and Co-channel Interference (CCI) in the CvD system using different modulation techniques. In the analysis of this paper, we use two modulation techniques, namely Concentration Shift Keying (CS...

Bit error rate computation for optical communication systems incorporating equal­ izers and under both noise and intersymbol interference (ISI) is discussed. An ac­ curate method based on a saddlepoint approximation is used for the computation. Previous work based on saddlepoint approximation has considered only the use of ba­ sic integration-and-dump detection. When ISI is strong, this simple ...

In this paper we study differential detection of Mary differential phase-shift-keyed (DPSK) signals with intersymbol interference and noise correlation. With these impairments there can be a wide variation in the error rate of the individual symbols, with this variation increasing with M. However, by adding a phase shift offset and adjusting the decision boundaries in the detector, this variati...

Wireless transmission is affected by fading and interference effects which can be combated with equalizer.The use of MIMO system promises good improvement in terms of spectral efficency,link relaibility andSignal to Noise Ratio (SNR). The effect of fading and interference always causes an issue for signal recovery in wireless communication. Equalization compensates for Intersymbol Interference ...

Communications in dispersive direct-sequence code-division multiple-access channels suffer from intersymbol and multiple-access interference, which can significantly impair performance. Joint maximum a posteriori probability equalization and multiuser detection with error control decoding can be used to mitigate this interference and to achieve the optimal bit error rate. Unfortunately, such op...

In this paper, a joint (multiuser) turbo equalizer performing single antenna interference cancellation (SAIC) for complex–valued modulation schemes is proposed. In order to improve the performance of a reduced–complexity equalizer for intersymbol interference (ISI) channels in different interference situations (overloaded system), an appropriate prefiltering approach is considered first. Oversa...

An all-digital implementation of multicarrier modulation called discrete multitone (DMT) modulation has been standardised for asymmetric digital subscriber line (ADSL), ADSL2, ADSL2+ and VDSL [1][3]. ADSL modems rely on DMT modulation, which divides a broadband channel into many narrowband subchannels and modulated encoded signals onto the narrowband subchannels [4], [5]. With advanced digital ...

Relying on space-time generalized multicarrier CDMA and exploiting both transmit and receive antenna diversity, we design herein multirate transceivers which guarantee deterministic symbol recovery with multipath-diversity gains regardless of the (possibly unknown) frequency-selective FIR channels and multiuser interference. Our approach is based on a three-level design of user codes: the outer...

Fluorescent lamps introduce a periodic interference signal in optical wireless receivers, which has the potential to severely degrade link performance. Usually, electrical high-pass filtering is employed to mitigate the effects of this interference, but this results in baseline wander or intersymbol interference. Digital pulse interval modulation (DPIM) is a modulation technique which has been ...