Journal ArticleDOI
Common Bandwidth Tranmission of Information Signals and Pseudonoise Synchronization Waveforms
TLDR
The high accuracy required for synchronization in data systems is obtained here by a pseudoternary precoding of the transmitted data which is adapted to the spectral properties of the synchronization cross correlator.Abstract:
This paper describes methods for the simultaneous transmission of information signals and pseudonoise synchronization waveforms in a common bandwidth. For a relatively low level of the pseudonoise signal, a satisfactorily high synchronization accuracy is obtained by means of correlation techniques. Conversely, the information signal is detected with negligible interference due to the synchronization waveform. This permits a new approach to synchronization in speech systems and data transmission. The application to speech systems is quite straightforward. Emphasis is placed on design considerations for narrow-band systems with regard to output signal-to-noise ratio and acquisition performance. In data transmission the method is applied for bit and word synchronization. Thus, no restrictions are imposed on the transmitted data patterns and no inclusion of special synchronization words is required. In addition, the bandwidth of the system is not increased. The high accuracy required for synchronization in data systems is obtained here by a pseudoternary precoding of the transmitted data which is adapted to the spectral properties of the synchronization cross correlator. In this way the influence of the data signal on the received synchronization signal is minimized. Calculations of synchronization accuracy are given which include the effect of transmission noise.read more
Citations
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A bibliography of the theory and application of the phase-lock principle
W. C. Lindsey,R. C. Tausworthe +1 more
TL;DR: A literature search was conducted in an effort to collect and compile as many references on the phase-locked loop as possible, and a comprehensive listing of approximately 800 references covering the past two decades of work reported throughout the world are presented.
Book ChapterDOI
Implicit Training and Array Processing for Digital Communication Systems
Simon Haykin,K. J. Ray Liu +1 more
TL;DR: This chapter contains sections titled: Introduction Classification of Implicit Training Methods IT-Based Estimation for a Single User IT- based Estimationfor Multiple Users Exploiting Array Processing: Continuous Transmission IT-based EstimationFor Multiple Usersexploiting array processing: Packet Transmission Open Research Problems.
Journal ArticleDOI
Primitive Polynomials for Iterative Recursive Soft Sequential Acquisition of Concatenated Sequences
TL;DR: It is observed that low-order primitive polynomials (PPs) achieve better performances than higher-order polynmials for both the concatenated sequences and the comparison of $m$ -sequences and concatenation sequences regarding the acquisition time.
Journal ArticleDOI
Tracking performance of improved delay-lock loop
TL;DR: The improved DLL (IDLL-1) with extended range of discriminator characteristic is proposed, which consists of IDLL-2 and simple circuits, which is proposed to compensate the fault of DLL.
Journal ArticleDOI
Linear Gain Controller Aided Iterative Soft Sequential Acquisition for Primitive Polynomials
Abbas Saddam Ahmed,Noman Mujeeb Khan,Syed Kamran Haider,Malik Imran Daud,Ateeq Ur Rehman,Elsayed Mohamed Tag Eldin +5 more
TL;DR: In this article , a novel approach using an EXtrinsic information transfer (EXIT) chart-aided method to investigate the concurrence of $m$ -sequences using Iterative Soft Sequence Estimation (ISSE) in a communication channel is presented.
References
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Journal ArticleDOI
Design and performance of phase-lock circuits capable of near-optimum performance over a wide range of input signal and noise levels
R. Jaffe,E. Rechtin +1 more
TL;DR: This paper explains how minimum-rms-error loops may be designed if the input-signal level, input-noise level, and a specification for transient performance are given.
Journal ArticleDOI
Acquisition of Pseudonoise Signals by Sequential Estimation
TL;DR: Performance of the sequential estimation system is compared with the stepping correlation system, and significant improvement of acquisition time is shown for signal-to-noise ratios down to approximately -15 dB.
Journal ArticleDOI
Delay-Lock Tracking of Binary Signals
TL;DR: The theory of operation and an evaluation of performance of a delay-lock tracking system for binary signals for target search and acquisition and of the effect of amplitude-limiting the received data on the system noise performance are presented.
Journal ArticleDOI
Comma-free error-correcting codes
TL;DR: It is demonstrated that all (n, k) {em cyclic} group error-Correcting code dictionaries can be made comma-free (without adding further redundancy or altering their error-correcting properties) if, and only if, k \leq (n - 1)/2 .