A communication system includes a demodulator configured to demodulate a modulated signal responsive to a first carrier signal. The demodulator includes a filter and a gain adjusting circuit. The filter is configured to generate a filtered first signal based on a first signal. The first signal is a product of the first carrier signal and the modulated signal. The filter has a gain adjusted based on a set of control signals. The gain adjusting circuit is coupled to the filter, and is configured to generate the set of control signals based on at least a voltage of the filtered first signal. The gain adjusting circuit includes a first peak detector coupled to the filter. The first peak detector is configured to output a peak value of the voltage of the filtered first signal.

A method of operating a radio receiver device comprises receiving a plurality of signals with a plurality of corresponding frequencies; applying respective gains to each of the plurality of signals; and storing the gain applied to each signal and its corresponding frequency. The method comprises subsequently receiving a further signal with a further frequency; and applying a further gain to the further signal. The further gain is determined using at least one of the stored gains according to a difference between the further frequency and at least one of the plurality of corresponding frequencies.

Dynamic automatic gain controller configuration in multiple input and multiple output receivers is provided by monitoring a given section of wireless spectrum for higher-priority signals using a first antenna set associated with a first Automatic Gain Controller (AGC) set while concurrently monitoring the given section of wireless spectrum for wireless packet-based traffic using a second antenna set associated with a second AGC set; in response to detecting a packet via the second antenna set: re-associating the first antenna set and the second antenna set to a third AGC set; receiving the packet via the first antenna set and the second antenna set using the third AGC set; and in response to the packet being received, re-associating the first antenna set to the first AGC set and the second antenna set to the second AGC set.

Embodiments of apparatus and method for digital variable gain adjustment (DVGA) are disclosed. In an example, a baseband chip includes an unpacking module, a symbol recording module operatively coupled to the unpacking module, and a first variable gain adjusting (VGA) module operatively coupled to the symbol recording module. The unpacking module is configured to unpack a plurality of symbols from a first representation of pseudo floating-point numbers to a second representation of fixed-point numbers. The symbol recording module is configured to obtain a symbol parameter based on the unpacking. The first VGA module is configured to dynamically adjust gains of the plurality of symbols having the second representation based on the symbol parameter.

Embodiments include methods and/or procedures for a user equipment (UE) to activate a secondary cell (SCell) for operating with the UE's primary serving cell (PSC). Embodiments include determining a receiver activity rate for the UE. Embodiments also include receiving, from the PSC, an activation request identifying the SCell. Embodiments also include activating the SCell based on the receiver activity rate. Other embodiments include complementary methods and/or procedures performed by a network node arranged to communicate with one or more UEs via a PSC and at least one selectively activated SCell. Other embodiments include UEs and network nodes configured to perform operations corresponding to various ones of the methods and/or procedures, as well as computer-readable media embodying such operations.

A communication system includes a transmitter configured to transmit a modulated signal, a transmission line configured to carry the modulated signal, and a receiver coupled to the transmitter by the transmission line, and configured to receive the modulated signal. The transmitter includes a modulator configured to generate the modulated signal responsive to a data signal and a carrier signal. The receiver includes a demodulator configured to demodulate the modulated signal responsive to a first carrier signal. The demodulator includes a filter and a gain adjusting circuit configured to adjust a gain of the filter, and to generate the set of control signals based on a voltage of the filtered first signal and a voltage of the first signal. The gain adjusting circuit includes a first peak detector coupled to the filter, and configured to detect a peak value of the voltage of the filtered first signal.

A method of controlling a signal power of a received signal received by a wireless communication device, the method including: measuring the signal power of the received signal at a plurality of time points in response to a gain control signal; calculating a variance of the signal power of the received signal at at least some time points of the plurality of time points; and controlling the signal power of the received signal based on a gain level determined according to the variance of the signal power of the received signal.

An Automatic Gain Control (AGC) SERDES circuit may be used to provide improved gain control for SERDES operation. This AGC SERDES circuit uses an initial gain convergence to determine and store an initial gain level. Once the initial gain convergence is complete, the AGC SERDES circuit uses a signal peak tracking to reduce or prevent saturation events. By setting the gain target based on tracked changes in the equalizer coefficients, the AGC SERDES circuit adapts the gain target to reduce or prevent saturation events and provide the improved communication throughput. A SERDES receiver circuit also provides improved performance using an improved convergence flow within its subcomponent blocks. The improved convergence flow also provides the ability to track environmental changes, voltage changes, and changes to input parameters, and can be performed while data is running on the link to provide continuously improved communication channel performance.

A method for use in a wireless node configured to receive a wireless signal includes receiving, using a first set of physical resources, a first wireless signal including an indicator descriptive of a transmission power used by a second wireless node when transmitting the wireless signal on a second set of physical resources, and receiving, using the second set of physical resources, the wireless signal using an Automatic Gain Control, AGC, configuration, wherein the AGC configuration is determined based on the indicator. The disclosure further relates to a wireless node performing the method.

A method of operating a radio receiver device comprises receiving a plurality of signals with a plurality of corresponding frequencies; applying respective gains to each of the plurality of signals; and storing the gain applied to each signal and its corresponding frequency. The method comprises subsequently receiving a further signal with a further frequency; and applying a further gain to the further signal. The further gain is determined using at least one of the stored gains according to a difference between the further frequency and at least one of the plurality of corresponding frequencies.