Multi-channel timing recovery system

A multi-channel receiver system comprising:

• an adjustable clocking circuit having an input and an output for producing sampling signals at its output which are responsive to timing signals applied to its input;
• means coupled to each channel of the receiver for sensing the signal-to-noise ration (SNR) of data signals received by each channel and for producing a control signal indicative of which channel has the highest SNR;
• signal frequency responsive means coupled to each channel of the receiver for producing a timing signal for each receiver channel corresponding to the frequency and phase of the signals received by each channel;
• and
• gating means coupled to said frequency responsive means and responsive to the control signal for selectively supplying to the input of the adjustable clocking circuit the timing signals from the receiver channel having the highest SNR.

A multi-channel receiver system comprising:

• an adjustable clocking circuit for producing sampling signals in response to timing signals;
• means coupled to each channel of the multi-channels of the receiver for sensing the signal-to-noise ration (SNR) of the data signals received by each channel and for producing a control signal indicative of which channel has the highest SNR;
• and
• means coupled to each channel of the multi-channels of the receiver for producing timing signals responsive to the frequency of the signals received by each channel and including means responsive to the control signal for supplying timing signals derived from the channel having the highest SNR to the adjustable clocking circuit for producing sampling signals which are a function of the signals received by the channel of the multi-channel receiver having the highest SNR.

A combination comprising:

• first and second input terminals for respectively receiving first and second portions of a data signal;
• first and second analog-to-digital converters (A/Ds);
• each A/D having an input and an output;
• said first A/D being coupled at its input to said first input terminal and said second A/D being coupled at its input to said second input terminal;
• each A/D having a sampling terminal for the application thereto of a sampling signal for controlling the rate at which it Samples the data received at its input;
• a first means coupled to the outputs of the first and second A/D for producing at a first output terminal information relative to the frequency of the data received at said first input terminal and for producing at a second output terminal information relative to the frequency of the data received at said second input terminal;
• a second means coupled to the outputs of the first and second A/Ds for sensing the signal to noise ratio (SNR) of the data received on each channel and for producing a control signal indicating which channel has the higher SNR;
• and
• selector means responsive to the control signal for coupling that one of the first and second output terminal whose data has the higher SNR to an adjustable timing recovery circuit signal for generating the sampling signals for the A/Ds.

A multi-channel receiver with each channel having an input terminal for receiving different portions of a data signal, comprising:

• an analog-to-digital converter (A/D) per channel;
• each A/D having an input and an output;
• each A/D being coupled at its input to a corresponding input terminal;
• each A/D having a sampling terminal for the application thereto of sampling signals for controlling the rate at which the A/D samples the data signals received at its input;
• controllable sampling means, coupled to each A/D, responsive to a timing signal for producing sampling signals which are a function of the frequency of the data signals received by the receiver and for supplying the same sampling signals to all the A/D's;
• means coupled to the output of each A/D for sensing which A/D has the highest signal-to-Noise ratio (SNR) and for producing a control signal indicative thereof;
• means coupled to the output of each A/D for sensing the frequency of the data signals received by each receiver channel and producing a corresponding timing signal;
• and
• means responsive to the control signal for supplying the timing signal of the receiver channel having the highest SNR to the controllable sampling means.