Wireless telecommunication digital receiver

A telecommunication receiver for receiving a wireless transmitted electromagnetic signal, said receiver comprising:

• antenna means for receiving said wireless transmitted electromagnetic signal and for converting same to a radio frequency (RF) signal;
• means for converting said RF signal into an intermediate frequency (IF) signal, having an amplitude;
• and for limiting said amplitude and for generating a receive signal strength intensity (RSSI) signal;
• bandpass converting means for receiving said amplitude limited IF signal and said RSSI signal, said converting means comprising:
• means for digitizing said amplitude limited IF signal at a first sampling rate to produce a digitized IF signal;
• means for converting said digitized IF signal to a plurality of digitized baseband signals;
• means for combining said plurality of digitized baseband signals to produce a complex signal S(t) in accordance with
• S(t)=I(t)+jQ(t) where I.sup.2 (t)+Q.sup.2 (t)=constant
• where I,Q are said plurality of digitized baseband signals;
• means for digitizing said RSSI signal, at a second sampling rate, to produce a digitized RSSI signal;
• means for multiplying said digitized RSSI signal with said complex signal to produce a complex baseband signal;
• means for equalizing said complex baseband signal by removing intersymbol interference;
• and
• means for detecting symbols in said equalized complex baseband signal.

A telecommunication receiver for receiving a wireless transmitted electromagnetic signal, said receiver comprising:

• a plurality of spaced apart antenna means for receiving said wireless transmitted electromagnetic signal and for converting same to a plurality of radio frequency (RF) signals;
• a plurality of means for converting said plurality of RF signals into a plurality of intermediate frequency (IF) signals each having an amplitude and for limiting the amplitude of each IF signal and for generating a receive signal strength intensity (RSSI) signal associated with each IF signal;
• bandpass converting means for receiving said plurality of IF signals, and the RSSI signal associated with each IF signal, said converting means comprising:
• means for converting each IF signal into a plurality of baseband signals;
• means for digitizing each of said plurality of baseband signals of each IF signal at a sampling rate to produce a plurality of digitized baseband signals;
• means for combining said plurality of digitized baseband signals for each IF signal to produce a complex signal S(t) in accordance with
• S(t)=I(t)+jQ(t) where I.sup.2 (t)+Q.sup.2 (t)=constant
• where I,Q are said plurality of digitized baseband signals for each IF signal;
• means for digitizing each of said RSSI signal associated with each IF signal, at said same sampling rate, to produce a digitized RSSI signal;
• means for multiplying each of said digitized RSSI signal with its associated complex signal to produce a complex baseband signal;
• means for combining said complex baseband signals into a symbol signal;
• and
• means for detecting symbols in said symbol signal.

A telecommunication receiver for receiving a wireless transmitted electromagnetic signal, said receiver comprising:

• a plurality of spaced apart antenna means for receiving said wireless transmitted electromagnetic signal and for converting same to a plurality of radio frequency (RF) signals;
• a plurality of means for converting said plurality of RF signals into a plurality of intermediate frequency (IF) signals each having an amplitude and for limiting the amplitude of each IF signal and for generating a receive signal strength intensity (RSSI) signal associated with each IF signal;
• bandpass converting means for receiving said plurality of IF signals, and the RSSI signal associated with each IF signal;
• said converting means comprising:
• means for digitizing each IF signal at a first sampling rate to produce a digitized IF signal;
• means for converting each digitized IF signal into a plurality of digitized baseband signals;
• means for combining each of said plurality of digitized baseband signals associated with each IF signal to produce a complex signal S(t) in accordance with
• S(t)=I(t)+jQ(t) where I.sup.2 (t)+Q.sup.2 (t)=constant
• where I,Q are said plurality of digitized baseband signals for each IF signal;
• means for digitizing each RSSI signal at a second sampling rate, lower than said first sampling rate, to produce a digitized RSSI signal;
• means for multiplying each of said digitized RSSI signal with its associated complex signal to produce a complex baseband signal;
• means for combining said complex baseband signals into a symbol signal;
• and
• means for detecting symbols in said symbol signal.

A method of detecting symbol signals in a wireless transmitted electromagnetic signal, said method comprising:

• receiving said wireless transmitted electromagnetic signal and converting same to radio frequency (RF) signal;
• converting said RF signal into an intermediate frequency (IF) signal, having an envelope and an amplitude;
• limiting the amplitude of said IF signal to produce an amplitude limited IF signal;
• detecting the envelope of the IF signal to generate a receive signal strength intensity (RSSI) signal;
• generating a digitized baseband signal containing only the phase of said IF signal from said amplitude limited IF signal;
• processing said digitized baseband signal by said RSSI signal to generate a complex baseband signal having the envelope of said IF signal;
• equalizing said complex baseband signal by removing intersymbol interference;
• and
• detecting symbols in said equalized complex baseband signal.