By Topic

# Communications, Radar and Signal Processing, IEE Proceedings F

## Filter Results

Displaying Results 1 - 18 of 18
• ### Algorithms for frame alignment Â¿ some comparisons

Publication Year: 1985, Page(s):529 - 536
Cited by:  Papers (6)
| | PDF (885 KB)

The paper presents a comprehensive analysis of frame alignment strategies for time division multiplexed digital signals. Comparisons are made between algorthims recommended by CCITT and others requiring slightly more sophisticated terminal processing. The principal transition times (misalignment detection, false exit, acquisition and false entry times) form the basis for comparison. The enhanced a... View full abstract»

• ### Doppler method for improving tracking accuracy of satellite receiving stations

Publication Year: 1985, Page(s):537 - 540
| | PDF (450 KB)

A system for extracting Doppler signals from the HRPT data stream transmitted by NOAA satellites is described. These signals are used to improve the accuracy of tracking in a system which relies on satellite ephemeris to predict antenna pointing angles. View full abstract»

• ### Performance of generalised AMF receivers for continuous phase modulation

Publication Year: 1985, Page(s):541 - 547
Cited by:  Papers (1)
| | PDF (812 KB)

Partial-response continuous phase modulation (CPM) signals can in many cases yield power spectra with narrow mainlobe and also low sidelobes. The optimum receiver for these signals is sometimes complex. In the paper the idea of using a smaller signal set in the receiver than used by the transmitter is considered. This is done by means of using a generalised average matched filter (AMF) receiver. O... View full abstract»

• ### HF spectral occupancy and frequency planning

Publication Year: 1985, Page(s):548 - 557
Cited by:  Papers (3)
| | PDF (825 KB)

The paper gives measurements of spectral occupancy for each ITU-defined user allocation, across the whole HF spectrum. Such measurements are being made currently during stable ionospheric conditions about midday and midnight, at the times of the winter and summer solstice, over a range of sunspot numbers. An application is given in which the occupancy results for a particular service (fixed in thi... View full abstract»

• ### Erratum: Analysis of a multilink system in the presence of noise, cochannel interference and some hardware imperfections

Publication Year: 1985
| PDF (90 KB)
• ### Spread-spectrum waveforms simplifying transform domain signal processing

Publication Year: 1985, Page(s):558 - 560
Cited by:  Papers (5)
| | PDF (372 KB)

In the paper a novel class of spread-spectrum waveforms is proposed which is based on spreading operations in the frequency domain. As a main advantage over conventional spread-spectrum waveforms, the proposed waveforms are especially well suited for transform domain correlation at low expense, because their Fourier spectra may be constructed from simple binary pseudonoise sequences. It will be sh... View full abstract»

• ### Error propagation in decision feedback receivers

Publication Year: 1985, Page(s):561 - 566
Cited by:  Papers (1)
| | PDF (710 KB)

The problem of assessing error propagation in decision-directed feedback receivers is considered. It is shown that useful bounds on error statistics can be obtained by modelling the error mechanism using stochastic state-transition diagrams and then employing state reduction techniques to enable the complexity of the problem to be contained. This provides a more widely applicable approach to obtai... View full abstract»

• ### Simplified technique for bounding error statistics for DFB receivers

Publication Year: 1985, Page(s):567 - 575
Cited by:  Papers (10)
| | PDF (875 KB)

A new metric, termed recovery distance¿¿, is introduced for decision feedback receivsers, and is shown to provide the basis for a simple technique for obtaining bounds on a wide range of error statistics. The error propagation process is modelled using stochastic state transition diagrams with merging of states having the same recovery distance, providing the simplification required to render tra... View full abstract»

• ### Class of binary cipher sequences with best possible autocorrelation function

Publication Year: 1985, Page(s):576 - 580
| | PDF (674 KB)

A new class of binary sequences called here m-like cipher sequences¿¿ are introduced which have rather interesting properties for use as cipher sequences. These are derived by interleaving the so-called `elementary m-sequences¿¿ along with some null sequences in a particular order. The resulting composite sequences are not m-sequences, but require deciphering and storage of a much larger number o... View full abstract»

• ### New design procedure for digital filters based on a finite-state machine implementation

Publication Year: 1985, Page(s):581 - 588
| | PDF (1073 KB)

The concept of a finite-state machine (FSM) is used in an attempt to cover the deficiencies of the conventional digital filter design procedure with respect to finite-word-length effects. The problem of synthesis is considered in detail and a procedure whereby the FSM mappings are designed to best model a given difference equation is presented. This procedure is based on a well known graph theory ... View full abstract»

• ### Asymptotic results for eigenvector methods

Publication Year: 1985, Page(s):589 - 594
Cited by:  Papers (31)
| | PDF (569 KB)

Asymptotic results are presented for the MUSIC and Kumaresan and Tufts spectral estimators. The paper makes use of results obtained by Sugiura, which are more accurate than those of Anderson. It is shown that the predictions are in good agreement with simulated results. View full abstract»

• ### Empirical observations of a sonar adaptive array

Publication Year: 1985, Page(s):595 - 597
| | PDF (446 KB)

The responses of adaptive and conventional acoustic array processors using data acquired from an underwater environment are compared. The data from a horizontal planar array with omnidirectional elements are processed using frequency-domain and element-space techniques to estimate the azimuthal noise anisotropy and to contrast the effectiveness of each processor. Three beamformers are represented:... View full abstract»

• ### Eclipsing effects with high-duty-factor waveforms in long-range radar

Publication Year: 1985, Page(s):598 - 603
Cited by:  Papers (7)
| | PDF (637 KB)

The partial eclipsing of returns in long-range radar with a high-duty-factor waveform is considered, and two eclipsing zones are shown to exist. The effects on clutter levels, by virtue of increased range sidelobes, and on signal/noise ratio, pulsewidth and pulse amplitude are examined. It is shown that the enhancement of range sidelobes caused by eclipsing, and the associated clutter effects, do ... View full abstract»

• ### Effect of adjacent channel interference and frequency-selective fading on outage of digital radio

Publication Year: 1985, Page(s):604 - 612
Cited by:  Papers (7)
| | PDF (923 KB)

Digital radio is affected by frequency-selective fading (FSF), which causes intersymbol interference (ISI), and by adjacent channel interference (ACI), which in its turn is also affected by the same FSF. Using a two-ray model for the FSF, the transfer function of the channel is H(f) = a[1 ¿¿ b exp ( ¿¿ j2¿¿¿¿(f ¿¿ f0))]. Outage in digital radio occurs when the bit error probability exceeds a criti... View full abstract»

• ### Book review: Least-Square Estimation with Applications to Digital Signal Processing

Publication Year: 1985
| PDF (150 KB)
• ### Radar detection prediction in sea clutter using the compound K-distribution model

Publication Year: 1985, Page(s):613 - 620
Cited by:  Papers (36)
| | PDF (945 KB)

In the paper the radar detection of targets in sea clutter modelled by the compound K-distribution is examined from a statistical detection viewpoint. Optimum performance is determined for both fixed threshold and ideal constant false alarm rate (CFAR) receivers for targets modelled by Swerling cases 0, 1 and 2. In particular, the performance of dual threshold binary integrators is assessed. The c... View full abstract»

• ### ESM processor system for high pulse density radar environments

Publication Year: 1985, Page(s):621 - 625
Cited by:  Papers (8)
| | PDF (692 KB)

A radar ESM system performs two functions: warning of impending threats and surveillance to determine radar activities. Automatic radar ESM systems are passive radar receivers which receive emissions from other platforms, measure the parameters of each pulse received and thus sort the emissions to enable determination of the radar parameters for each emitter. These parameters are then compared wit... View full abstract»

• ### IEE Conference Publication 247 (Advances in Command, Control and Communication Systems: Theory and Applications)

Publication Year: 1985
| PDF (117 KB)

## Aims & Scope

The latest version of this title is Radar, Sonar & Navigation, IET.

Full Aims & Scope