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A method for generating a single-frequency signal in a broadband wireless transceiver

A single-frequency signal, broadband wireless technology, applied in transmission systems, electrical components, etc., can solve problems such as increasing cost and increasing circuit area, and achieve the effect of saving cost, reducing area, and eliminating auxiliary units

Active Publication Date: 2021-03-30
CHONGQING SOUTHWEST INTEGRATED CIRCUIT DESIGN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When correcting the quadrature error at the receiving end, an additional auxiliary correction module is required to be connected to the receiving end through a switch, which increases the area of ​​the circuit and increases the cost

Method used

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  • A method for generating a single-frequency signal in a broadband wireless transceiver
  • A method for generating a single-frequency signal in a broadband wireless transceiver
  • A method for generating a single-frequency signal in a broadband wireless transceiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: see Figure 1 to Figure 2 , a method for generating a single-frequency signal in a broadband wireless transceiver, the wireless transceiver includes a transmitter 2 and a receiver 1 .

[0039] The receiver 1 is provided with a low noise amplifier LNA, a first local oscillator RXLO, a first quadrature signal generating circuit, a digital circuit, a first I channel and a first Q channel, and the signal receiving end of the receiver receives the signal Finally, after the signal is processed by the low-noise amplifier LNA, it is respectively input into the I channel and the Q channel of the receiver; the I channel of the receiver is provided with the first mixer MIXEA1, the first programmable gain amplifier in order PGA1, the first low-pass filter LPF1 and the first analog-to-digital converter ADC1; the Q channel of the receiver is provided with a second mixer MIXEA2, a second programmable gain amplifier PGA2, and a second low-pass filter in sequence LPF2 and...

Embodiment 2

[0090] Example 2. See image 3 , the difference from Embodiment 1 is that the single-frequency signal S T The signal is directly output to the receiving end of the receiver through the switch, processed by the low-noise amplifier LNA, and then output to the input end of the mixer of the receiver, and the mixer of the receiver performs down-conversion processing on the received signal.

Embodiment 3

[0091] Example 3. See Figure 4 , the difference from Embodiment 1 is that after the single-frequency signal is amplified by the power amplifier, it is output to the mixer input terminal of the receiver through the switch, and the mixer of the receiver performs down-conversion to the received signal deal with.

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PUM

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Abstract

The invention discloses a method for generating a single-frequency signal in a broadband wireless transceiver. The wireless transceiver comprises a transmitter and a receiver. the method is characterized by comprising the following steps of: 1, fixing the local oscillation frequency of a local oscillator arranged on a receiver as the working frequency of the receiver; 2, inputting the direct current signals into an I channel and a Q channel of a transmitter respectively; step 3, changing the local oscillation frequency of a local oscillator arranged on the transmitter according to a certain step; 4, after the frequency mixer arranged in the I-path channel and the frequency mixer arranged in the Q-path channel respectively perform up-conversion processing on the received signals, inputting the signals into an addition circuit arranged in the transmitter; 5, enabling the addition circuit to combine the received I and Q paths of signals to obtain a single-frequency signal; 6, outputting the single-frequency signal to a receiver through a switch. The method can be widely applied to various communication systems.

Description

technical field [0001] The invention relates to a broadband wireless transceiver, in particular to a method for generating a single-frequency signal in the broadband wireless transceiver. Background technique [0002] Wireless transceivers generally use a direct conversion structure for frequency conversion. The transmitting local oscillator passes two quadrature signals with the same frequency and a phase difference of 90° to mix to obtain a radio frequency transmission signal; the receiving local oscillator passes two quadrature signals with the same frequency and a phase difference of 90°. The quadrature signal is mixed to obtain the baseband signal. However, in the actual hardware circuit, the physical limitations of the device and the error of the circuit layout will cause the amplitude and phase error of the I-channel and Q-channel signals, and in the broadband wireless transceiver, the mixer, low-pass filter, amplifier, etc. The responses of the I and Q signals are f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04B1/50H04B1/00H04B1/401
CPCH04B1/005H04B1/40H04B1/50
Inventor 田翠翠范麟余晋川万天才刘永光徐骅李明剑陈刚唐睿
Owner CHONGQING SOUTHWEST INTEGRATED CIRCUIT DESIGN