Preferably, rapidly-fading signals are identified by evaluating second derivative signals of the strength-indicative signals, and weighted accordingly if a non-fading signal is available.
An increase in transmit power may be effective in reacquiring lock when the cause of the out-of-lock condition is slow fading, rather than fast fading.
Broadcasting on the FM band suffers from one major disadvantage for digital transmission on account of a propagation problem called spatial fading, or flat fading.
Although this structure may be effective for binary phase shift keying in Rayleigh fading, it is suboptimal for Rician fading and for 16-ary quadrature amplitude modulation in Rayleigh fading.
A receiver having an improved reception quality for FM and AM modulated waves and effective even under flat fading and frequency-selective fading.
A method for maintaining a transmission during a channel fade is described.
Speckle patterns result in the graining of a holographic reconstruction and worsen the quality thereof.
The triggering of N2m indicates the presence of a channel fade for a predetermined first time period.
Two consecutive commercial messages are accompanied by a first, second, and then a final or third fade control signal.
Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels.
The determination that a radio uplink channel power fade exists can be made in either the radio access network or the mobile station.
Space-time diversity is provided pursuant to an encoder (28), thereby to facilitate communication of data upon communication channels (16) susceptible to fading conditions.
The color forming composition can include a leuco dye, an infrared absorber, and at least one of a stabilizer and an anti-fade agent.
Thus, the communication device imitates a short fade during the communication session to conserve battery power.
This invention provides a simple and effective solution to the application of space-time code in frequency selective fading channel.