Search results
Results from the WOW.Com Content Network
Haykin received BSc (First-Class Honours) (1953); Ph.D. (1956), and DSc. (1967), degrees-all in Electrical Engineering from University of Birmingham, UK (England).He is a Fellow of the Royal Society of Canada, and a Fellow of the Institute of Electrical and Electronics Engineers for contributions to signal processing, communications theory, and electrical engineering education. [3]
One of the causes of intersymbol interference is multipath propagation in which a wireless signal from a transmitter reaches the receiver via multiple paths. The causes of this include reflection (for instance, the signal may bounce off buildings), refraction (such as through the foliage of a tree) and atmospheric effects such as atmospheric ducting and ionospheric reflection.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
More recently other practical applications have been developed, including image processing (e.g. where there is periodic structure imaged through projective geometry), [6] [8] as well as to excise chirp-like interference in spread spectrum communications, [9] in EEG processing, [10] and Chirplet Time Domain Reflectometry.
Gaussian minimum-shift keying, or GMSK, is similar to standard minimum-shift keying (MSK); however, the digital data stream is first shaped with a Gaussian filter before being applied to a frequency modulator, and typically has much narrower phase shift angles than most MSK modulation systems.
Angle modulation is a class of carrier modulation that is used in telecommunications transmission systems. The class comprises frequency modulation (FM) and phase modulation (PM), and is based on altering the frequency or the phase, respectively, of a carrier signal to encode the message signal.
For typical voice communications channels, improvements are typically 5–15 dB. FM broadcasting using wider deviation can achieve even greater improvements. Additional techniques, such as pre-emphasis of higher audio frequencies with corresponding de-emphasis in the receiver, are generally used to improve overall SNR in FM circuits.
Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier wave . Phase modulation is one of the two principal forms of angle modulation , together with frequency modulation .