A High Data Rate Millimeter Wave Super Regenerative Receiver

Abstract

The invention discloses a high data rate millimeter wave super regenerative receiver, and relates to the millimeter wave transceiver technology of the new generation information technology. This solution is proposed in view of the problems existing in the prior art such as small dynamic range, SILO residue of super regenerative oscillator, inter-symbol crosstalk in front-stage circuit, etc. The low-noise amplifier is directly connected to the RF input signal; the super-regenerative oscillator adopts a cross-coupled oscillation structure, and a symmetrical MOS tube switch is connected in parallel at the resonant cavity, and the symmetrical MOS tube switch is controlled by a quenching signal. The advantages are that it can work at a high symbol rate; it has a large dynamic range; it can realize high-order digital modulation; it can prevent the spectrum leakage of the receiver; it is relatively simple and has strong flexibility.

Description

technical field [0001] The invention relates to the millimeter wave transceiver technology of the new generation information technology, in particular to a high data rate millimeter wave super regenerative receiver. Background technique [0002] With the growing demand for high-data-rate wireless communications and the development of broadband circuits in millimeter-wave bands, such as wideband low-noise amplifiers (LNAs, PAs), more and more attention has been paid to ultra-high-speed communications in millimeter-wave bands with moderate spectral efficiency. In recent years, many millimeter-wave receivers with high data rates in CMOS technology have been proposed. However, the realization of high data rate requires higher power consumption, because the gain of a single-stage amplifier in the millimeter-wave band is very limited, and multi-stage amplifier cascading is required to achieve sufficient gain, and the problem of broadband millimeter-wave amplifiers is even more ser...

AI Technical Summary

Problems solved by technology

Although this kind of circuit has a simple structure, its spectrum utilization efficiency is low, and it is difficult to achieve high data rate communication. It is often used in low-power scenarios such as medical treatment and WSN [5], [6]

The super regenerative oscillator SILO cascade can achieve higher sensitivity and greater gain [7], but it still cannot be applied to data communication scenarios. This circuit has the problems of complex control signals and difficult phase restoration.

In addition, the existing technology has the problem of small dynamic range. Because the input signal power is too small, the oscillator cannot establish a large enough oscillation through the signal, and when the received signal power is too large, the oscillator enters a saturated state prematurely. the maximum amplitude

A small dynamic range limits the receiver's ability to detect amplitude information, while reducing the stability and reliability of the communication link

[0009] In addition, the existing technology is susceptible to inter-symbol interference at high symbol rates, which is caused by two factors. One is that the short oscillator switching time makes the residual problem more serious. This problem is exacerbated by the limitation that the regenerative oscillator SILO decreases with switching time

However, what limits the data rate of the system to a lower level may be caused by the pre-stage circuit of the super regenerative oscillator SILO. Since the amplifier cannot achieve infinite bandwidth, it will always be affected by the problem of intersymbol interference, and the same performance It is the damped oscillation residue of the previous symbol, which is superimposed on the subsequent symbol and affects demodulation

[0010] To sum up, the existing technology has a small dynamic range, SILO residual problem of the super-regenerative oscillator, and intersymbol interference problem of the pre-stage circuit. These factors limit the increase of the gain and data rate of the super-regenerative receiver. Invention of a complete super-regenerative receiver for high-rate communication scenarios

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