In this paper, we investigate the use of widely linear processing in multiple-input multiple-out (MIMO) systems employing filter bank based multi-carrier with offset quadrature amplitude modulation (FBMC/OQAM). The concept of a twostep receiver combining linear processing and widely linear processing is presented. In the first step we cancel the intrinsic interference that prevents us from expl...

OBJECTIVE High voice users (individuals who demonstrate excessive or loud vocal use) are at risk for developing voice disorders. The objective of this study was to examine, both acoustically and perceptually, vocal changes in healthy speakers after an acute period of high voice use. METHODS Members of a university women's volleyball team (n = 12) were recorded a week before (pre) and week aft...

The timing pulse from a Global Positioning System (GPS) receiver is typically within 1μs of Coordinated Universal Time (UTC) kept at NIST, called UTC(NIST), even if the receiver and antenna have not been calibrated for delays. However, it is not possible for most laboratories to make an accurate measurement of their GPS receiver’s time offset with respect to UTC(NIST), or to monitor its continu...

Research has shown that significant degradation in performance can occur even when operating within the limits for carrier frequency and modulation index offsets permitted by the Bluetooth standard. This is even more severe for multi-bit detectors like the matched filter bank receiver, because such errors accumulate across a longer observation interval. This paper details the derivation of a st...

This paper describes a system architecture along with signal processing technique which allows a reduction in the complexity of a 3.1–10.6 GHz Ultra-Wideband radio. The proposed system transmits passband pulses using a pulser and antenna, and the receiver front-end down-converts the signal frequency by subsampling, thus, requiring substantially less hardware than a traditional narrowband approa...

This paper presents a new algorithm for frequency offset estimation for Polynomial Cancellation Coded Orthogonal Frequency Division Multiplexing with symbols overlapped in the time domain (Overlap PCC-OFDM). The algorithm exploits the Subcarrier Pair Imbalance (SPI) caused by frequency offset. The estimation is performed in the frequency domain. No training symbols or pilot tones are required. ...

Conventional orthogonal frequency-division multiplexing receivers disregard the guard interval in channels with small dispersion even though its unconsumed portion can be exploited for improved demodulation by applying a Nyquist-shaped window in the receiver. The transmitter does not need to be modified, subcarrier orthogonality in the receiver is preserved, and the receiver discrete Fourier tr...

This paper investigates a design and performance of 4parallel MB-OFDM UWB receiver. The performance of the proposed MB-OFDM UWB receiver using a 4-parallel synchronization structure is degraded by 0.25 dB compared with that of a receiver using a 1-parallel synchronization structure in the maximum frequency/sampling clock offset tolerance in an AWGN channel. Considering other impairments, includ...

High Order Quadrature Amplitude Modulation (QAM) is a high-bandwidth-efficient modulation scheme employed in the wireless communications. For this type of modulation, one of the most important problems is carrier recovery to allow a coherent demodulation. To extract correctly the transmitted symbols as the carrier frequency offset between the transmitter and receiver is inevitable, the receiver...

1 Background to the system This paper describes a low complexity method of calculating the estimate of fine frequency offset and fine sample clock offset in an OFDM receiver. Fine frequency offsets of less than one subcarrier spacing, and fine sample clock offsets cause loss of orthogonality in an OFDM receiver, leading to loss of noise margin. The described technique uses a short DFT to estima...