In the future, there will be a growing need for more flexible but efficient utilization of radio resources. Increased flexibility in radio transmission, however, yields a higher likelihood of interference owing to limited coordination among users. In this paper, we address the problem of flexible spectrum sharing where a wideband single carrier modulated signal is spectrally overlapped by unkno...

~ dcg Abstract | Spectral eeciency of CDMA systems with linear interference suppression and channel coding is calculated. For interference suppression by decorrelation (zero{ forcing, ZF) an analytical solution is given. For interference suppression according to the minimum mean squared error (MMSE) criterion a numerical approximation is applied. Hereby, it turns out, that the optimum modulatio...

This paper proposes an interference suppression technique using nulling filter and turbo equalizer for carrier interferometry (CI) based one-cell reuse single-carrier time division multiple access (TDMA) systems. In the proposed scheme, CI technique is employed to generate CI signal which is equivalent to single carrier signal with its roll-off factor of zero. At the receiver, received CI signa...

This discussion will be primarily focused on the problem of jointly suppressing the different interferences such as Multiple Access Interference (MAI) and Intersymbol Interference (ISI), which are the limiting sources of interference for high data-rate wireless applications, as in wireless multimedia or Spread Spectrum Code Division Multiple Access. After describing the general problem of inter...

In this work, a novel scheme is proposed to enhance the self-interference (SI) cancellation in full-duplex communications. Beyond conventional SI schemes that rely on suppression, our exploits periodic antenna switching generate pseudo-Doppler effect, thus completely removing at fundamental frequency. way, desired signal readily obtained through low-pass filter. For purpose of performance evalu...

A common problem with radiofrequency (RF) receivers is that in addition to the desired signal, there is an interfering signal of much greater total power. These receivers can be for communications, radar, interception, etc. The interference can arise intentionally, such as from intentional jamming, or unintentionally, such as radiofrequency interference from a nearby transmitter. There is a nee...