Dual-polarized signaling constitutes an effective frequency-reuse technique to enhance the cell capacity in cellular mobile-radio systems. In the present paper, we present a new cross-polarization interference canceler (XPIC) which accomplishes the polarization-recovery task in time-division multiple-access (TDMA)based cellular radio systems. The main new attractive feature of the proposed XPIC...

In this paper, noncoherent sequence detection, proposed in a companion paper [1] by Colavolpe and Raheli, is extended to the case of continuous phase modulations (CPM’s). The results in the companion paper on linear modulations with intersymbol interference (ISI) are used here because a CPM signal is mathematically equivalent to a sum of ISI-affected linearly modulated components, according to ...

Estimation of the channel impulse responses of multiple cochannel users is a key requirement of all multiuser detection and interference cancellation techniques, though little attention has been paid to subject in the context of TDMA systems. This paper addresses a pilotbased technique for multiuser channel estimation in a TDMA system, and makes several new contributions: it allows for time var...

This paper considers iterative frequency-domain receivers for block transmission techniques with rate-1 Space Time Block Coding (STBC) for two and four transmit antennas using both Orthogonal Frequency Division Multiplexing (OFDM) and Single-Carrier (SC) schemes. The proposed receiver includes an interference canceller which enhances the performance of the non-orthogonal STBC scheme with 4 tran...

The purpose of this paper is to evaluate the impact of adjacent channel interference in network coverage and capacity, and find a strategy to minimize it. This strategy consists of identifying the optimal spacing between adjacent carriers in the radio spectrum available for use. To define this strategy, first the issue of dead zones is analyzed. Here, for different spacing between adjacent carr...

We consider a direct-sequence spread-spectrum multipleaccess network. It is widely known that the probability of symbol error in such a network is dependent on the carrier and spreading code chip phases of the interfering terminals with respect to the signal of interest. As a result, for a given total interference power, the performance is worse for the case of one strong interferer when compar...

We explore the use of Bluetooth friendly names within the mobile space. Each Bluetooth-enabled device possesses a short string known as a ‘friendly name’ used to help identify a device to human users. In our analysis, we collected friendly names in use on 9,854 Bluetooth-enabled devices over a 7-month period. These names were then classified and the results analysed. We discovered that a broad ...

Future wireless communication system is expected to have a high data rate transmission. OFDM is a promising candidate for achieving high data rates in mobile environment because of its multicarrier modulation technique. A well-known problem of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. This carrier frequency offset (FO) causes loss of o...

---------------------------------------------------------------------***----------------------------------------------------------------Abstract –Orthogonal Frequency Division Multiplexing (OFDM)is the promising candidate of a multiple carrier modulation technique because it does not require equalizers. OFDM is robust in adverse channel conditions and allows a high level of spectral efficiency....

Pseudorandom PSK [1] enables parallel communication on the same carrier frequency and at the same time. We propose different signal processing methods to receive data modulated with pseudorandom PSK. This includes correlation with the carrier frequency which can be applied to signals in the kHz to MHz range and signal processing in the intermediate frequency where the correlation with the carri...