Radio reception relies on antennas for the collection of electromagnetic fields carrying information, and receiver elements demodulation retrieval transmitted information. Here, we demonstrate an atom-based AM FM microwave communication with a 3 dB bandwidth in baseband ~100 kHz that provides optical circuit-free field pickup, multiband carrier capability, inherently high sensitivity. The explo...

This paper presents a 115-mW Global Positioning System radio receiver that is implemented in a 0.5m CMOS technology. The receiver includes the complete analog signal path, comprising a low-noise amplifier, I-Q mixers, on-chip active filters, and 1-bit analog-digital converters. In addition, it includes a low-power phase-locked loop that synthesizes the first local oscillator. The receiver achie...

This paper investigates the estimation of radio channel parameters from receiver data, whereby the transmitter is fully unknown. We use a multipath model to describe the radio channel between transmitter and receiver. According to this model, we discuss the accessibility of parameters for estimation. Based on the Maximum-Likelihood principle, we derive a cost function. A second cost function is...

Introduction There are several possible mechanisms that might underlie perceptual excellence, which we can describe by reference to a metaphor regarding audio amplifiers. There are several factors that limit a physical device such as a radio receiver. First, the internal amplifier has some intrinsic noise, which gets amplified along with the radio signal. Second, the radio tuner may be unaccept...

Time variations of the mobile radio channel cause InterCarrier Interference (ICI) to Orthogonal Frequency Division Multiplexing (OFDM) and Multi-Carrier CDMA (MCCDMA) radio links. This paper evaluates the effect of Doppler and delay spreads on the performance of an MC-CDMA receiver. An MMSE receiver is analyzed for MC-CDMA transmission over a mobile channel with Doppler. A simplified, pseudo MM...

Mobile device positioning in ad hoc networks is a crucial issue due to the network properties and hardware limitations of particular devices (nodes). In this paper, a new conception of mobile device based on software defined radio architecture for mobile positioning in ad hoc networks is proposed. Sixport technology is implemented into our software defined radio receiver. Angle of arrival local...

In this paper, a low voltage ultra-wideband RF receiver for Software-Defined Radio (SDR) is presented. In SDR design, the radio frequency (RF) receiver should be able to receive signals over a broadbandwidth so that it can satisfy a variety of different communication standards. In the proposed design, working frequency ranging from 0.1GHz to 6GHz RF front-end for SDR, covering almost all of mat...

—The power allocation in an underlay cognitive radio network rises up several challenges due to rapid utilization of the available spectrum hole. In this paper, we propose a noncooperative power-game algorithm to solve the power allocation problem in an underlay cognitive radio network with two main objectives: (i) to provide good quality of service to cognitive radio nodes, and (ii) to protec...

The wireless market of the future will demand inexpensive hardware, expandability, interoperability, and the implementation of advanced signal processing functions—i.e. a software radio. Configurable computing machines are often ideal software radio platforms. In particular, the Stallion reconfigurable processor's efficient hardware reuse and scalability fulfill these radio's demands. The advan...

The purpose of this paper is to show through laboratory results, the performance of the new DLIF (Double Low-IF) receiver architecture. This new approach minimizes the receiver’s cost by eliminating the need for RF image-reject and IF-Saw channel filters, avoids some of the shortcomings of direct conversion and single Low-IF methods and can be applied in GSM-like mobile stations. Performance re...