Insertion phase variation compensation module and method of counteracting the effect of a phase offset introduced into a received signal

Abstract

A communication system including an amplifier, a receiver, an analog to digital converter (ADC) and an insertion phase variation compensation module. The amplifier receives a communication signal. If the amplifier is enabled, the amplifier amplifies the communication signal and outputs the amplified communication signal to the receiver. If the amplifier is disabled, the amplifier passes the communication signal to the receiver without amplifying it. The receiver outputs an analog complex signal to the ADC. The ADC outputs a digital complex signal to the insertion phase variation compensation module which counteracts the effects of a phase offset intermittently introduced into the communication signal when the amplifier is enabled or disabled.

1 . A method for counteracting the effect of a phase offset, x, introduced into a received signal, the method comprising: 
 (a) receiving a real input, Re, associated with a digital in-phase (I) signal component;    (b) receiving an imaginary input, Im, associated with a quadrature (Q) signal component; and    (c) generating an I signal component having a phase that is adjusted in accordance with the following function: (Cos(x)×Re)−(Sin(x)×Im).    
   
   
       2 . A method for counteracting the effect of a phase offset, x, introduced into a received signal, the method comprising: 
 (a) receiving a real input, Re, associated with a digital in-phase (I) signal component;    (b) receiving an imaginary input, Im, associated with a quadrature (Q) signal component; and    (c) generating a Q signal component having a phase that is adjusted in accordance with the following function: ((Sin(x)×Re)+(Cos(x)×Im).    
   
   
       3 . An insertion phase variation compensation module for counteracting the effect of a phase offset, x, introduced into a received signal, the insertion phase variation compensation module comprising: 
 (a) a real input, Re, associated with a digital in-phase (I) signal component;    (b) an imaginary input, Im, associated with a quadrature (Q) signal component;    (c) an imaginary output configured to output an I signal component having a phase that is adjusted in accordance with the following function: (Cos(x)×Re)−(Sin(x)×Im).    
   
   
       4 . The insertion phase variation compensation module of  claim 3  further comprising: 
 (d) a first multiplier for multiplying Cos(x) by Re to generate a first product;    (e) a second multiplier for multiplying Sin(x) by Im to generate a second product; and    (f) an adder for subtracting the second product from the first product to generate the phase-adjusted I signal component.    
   
   
       5 . An integrated circuit (IC) comprising the insertion phase variation compensation module of  claim 3 .  
   
   
       6 . A wireless transmit/receive unit (WTRU) comprising the insertion phase variation compensation module of  claim 3 .  
   
   
       7 . An insertion phase variation compensation module for counteracting the effect of a phase offset, x, introduced into a received signal, the insertion phase variation compensation module comprising: 
 (a) a real input, Re, associated with a digital in-phase (I) signal component;    (b) an imaginary input, Im, associated with a quadrature (Q) signal component; and    (c) a quadrature output configured to output a Q signal component having a phase that is adjusted in accordance with the following function: (Sin(x)×Re)+(Cos(x)×Im).    
   
   
       8 . The insertion phase variation compensation module of  claim 7  further comprising: 
 (d) a first multiplier for multiplying Sin(x) by Re to generate a first product;    (e) a second multiplier for multiplying Cos(x) by Im to generate a second product; and    (f) an adder for adding the first and second products to generate the phase-adjusted Q signal component.    
   
   
       9 . An integrated circuit (IC) comprising the insertion phase variation compensation module of  claim 7 .  
   
   
       10 . A wireless transmit/receive unit (WTRU) comprising the insertion phase variation compensation module of  claim 7.