Apparatus for privacy transmission in system having bandwidth constraint

In a receiver having an adaptive equalizer to which received signals are applied for filtering received signals having information originally provided in discrete symbol intervals occurring at a first rate, said adaptive equalizer including means for sampling said received signals and means for weighting and combining the resulting samples to provide filtered signals and means for adjusting the weights of said samples, the improvement wherein;

• said sampling means samples said received signals at a rate greater than said first rate, and said adjusting means includes means for beginning said adjusting of said weights, and thus training of said equalizer, within a predetermined time after receipt of said received signals and regardless of the initial timing relationship between said sampling of said received signals and said discrete symbol intervals.

In a communications system having a transmitter and a receiver adapted to provide communications over a communications channel, comprising

• said transmitter includes means for transmitting an information bearing signal in discrete symbol intervals occurring at a first rate;
• and
• said receiver includes an adaptive equalizer to which received signals are applied for filtering thereof with said adaptive filter including means for samplng said received signals and means for weighting and combining the resulting samples to provide filtered signals and means for adjusting the weights of said samples, said sampling means sampling said received signals at a greater than said first rate and said adjusting means includes means for beginning said adjusting of said weights and thus training of said equalizer within a predetermined time after receipt of said received signals and regardless of the initial timing relationship between said sampling of said received signals and said discrete symbol intervals.

A method of filtering a received signal including symbols transmitted in discrete time intervals occurring at a first rate comprising sampling said received signal and weighting and combining the resulting samples to thus provide a filtered signal and adjusting the weights of the samples, the improvement wherein;

• the step of sampling said received signal includes the step of sampling at a rate greater than said first rate and
• said weighting step includes the step of beginning adjustment of said weighting within a predetermined time after the arrival of said received signal regardless of the initial timing relationship between said sampling and said discrete time intervals.

A method for processing a received signal having information provided in discrete intervals occurring at a first rate, comprising the steps of:

• sampling the received signal at a second rate greater than said first rate in order to produce a resulting sampled signal;
• weighting and combining samples from said resulting sampled signal in order to provide filtered output signals;
• and beginning adjustment of said weighting within a predetermined time after receipt of the received signal and independent of the initial timing relationship between the discrete intervals of the received signal and said resulting sampled signal.