This application note investigates the basic theory of software-based receivers for L1-band civilian GPS applications, including a discussion of signal acquisition and tracking, and the need for bit synchronization in the receiver. It then details a low-cost method for adding GPS capability to laptop PCs through a USB dongle with the MAX2769 universal GPS receiver. A similar version of this art...

This paper presents an implementation of a GFSK receiver based on matched filtering of a sequence of successive bits. This enables improved detection and superior BER performance but requires matched filters of considerable complexity. Exploiting redundancy, and performing phase propagation of successive single-bit stages, we propose a new receiver structure of low complexity. Simulation result...

We describe recent results on multiple-antenna transmission systems. These are known to offer a potential performance, in terms of bit/s/Hz, that cannot be obtained otherwise with present-day technology. We summarize the theoretical performance limits of these systems under the assumptions that the channel gains are known to the receiver, to the transmitter and to the receiver, or to neither. C...

An n-bit string is encoded as a sequence of nonorthogonal quantum states. The parity bit of that n-bit string is described by one of two density matrices, r0 (n) and r1 (n) , both in a Hilbert space of dimension 2. In order to derive the parity bit the receiver must distinguish between the two density matrices, e.g., in terms of optimal mutual information. In this paper we find the measurement ...

This paper introduce the Bit error rate, (BER) simulation using Mat lab. Bit error rate, (BER) is a key parameter that is used in assessing systems that transmit digital data from one location to another. Systems for which bit error rate, is applicable include radio data links as well as fiber optic data systems, Ethernet, or any system that transmits data over a network of some form where nois...

This paper presents some results on adaptive minimum mean-square error (MMSE) turbo equalization obtained from underwater experiments in the Atlantic ocean. The performance gain is evaluated as a function of the number of hydrophones at the receiver side. Single-carrier transmission with high-order modulations is considered, at a coded bit rate as high as 24 kb/s on the underwater acoustic chan...

of photodiode and transimpedance amplifier on a 12.4 Moisture Sensitivity and Soldering. narrowly-focused beam falling only on the photodiode provides improved settling times from allanalog circuits to data conversion base circuits. Q1 and Q2 form a "cascode" amplifier circuit. To compensate for the high-frequency rolloff of the photodiode, U1B is configured as Daylight modifications will drama...

The purpose of the switch feature is to prevent distortion of high signal levels in receiver applications by bypassing the amplifier altogether. The bypass switch can be thought of as a 1-bit digital AGC circuit that not only prevents distortion by bypassing the MGA-72543 amplifier, but also Figure 1. MGA-72543 Functional diagram. reduces front-end system gain by approximately 16 dB to avoid ov...

The authors present a low-power 850 nm Si optoelectronic integrated circuit (OEIC) receiver fabricated in standard 65 nm complementary metal–oxide semiconductor (CMOS) technology. They analyse power consumption of previously reported CMOS OEIC receivers and determine the authors receiver architecture for low-power operation. Their OEIC receiver consists of a CMOS-compatible avalanche photodetec...

Recently, zero-padding orthogonal frequency division multiplexing (ZP-OFDM) has been proposed as an alternative solution to the traditional cyclic prefix (CP)-OFDM, to ensure symbol recovery regardless of channels nulls. Various ZP-OFDM receivers have been proposed in the literature, trading off performance with complexity. In this paper, we propose a novel low-complexity (LC) receiver for ZP-O...