Systems and methods are disclosed for adjusting Radio Link Monitoring (RLM), Radio Link Failure (RLF) detection, RLF recovery, and/or connection establishment failure detection for wireless devices (16) in a cellular communications network (10) depending on mode of operation. In one embodiment, a node (14, 16) in the cellular communications network (10) determines whether a wireless device (16) (e.g., a Machine Type Communication (MTC) device) is to operate in a long range extension mode of operation or a normal mode of operation. The node (14, 16) then applies different values for at least one parameter depending on whether the wireless device (16) is to operate in the long range extension mode or the normal mode. The at least one parameter includes one or more RLM parameters, one or more RLF detection parameters, and/or one or more RLF recovery parameters. In doing so, signaling overhead and energy consumption within the wireless device (16) when operating in the long range extension mode is substantially reduced.

An apparatus comprises a radio frequency (RF) antenna circuit; an antenna aperture tuning circuit; an antenna impedance measurement circuit; and a processor circuit electrically coupled to the tunable antenna aperture circuit and the impedance measurement circuit. The processor circuit is configured to: set the antenna aperture tuning circuit to an antenna aperture tuning state according to one or more parameters of an RF communication network; initiate an antenna impedance measurement; and change the antenna aperture tuning state to an antenna aperture tuning state indicated by the antenna impedance.

A transmitter includes a pre-emphasis digital filter configured to filter a series of respective digital input data samples according to a plurality of coefficients to generate a series of respective corresponding pre-emphasized data samples. The transmitter also includes a digital-to-analog converter (DAC) configured to sample the series of pre-emphasized data samples to generate an analog signal and an analog filter configured to filter the analog signal to generate a filtered signal. Estimator circuitry is configured to input a pre-emphasized data sample; input a corresponding sample of the filtered signal; and calculate the plurality of coefficients based on the sample of the filtered signal and the pre-emphasized data sample.

A computer-implemented reconstruction method of discrete digital signals in noisy overloaded wireless communication systems with CSI Errors that is characterized by a channel matrix of complex coefficients, the method including receiving the signal from channel by a signal detector, estimation of the CSI error parameter τ is done at the receiver, estimation noise power is done by a noise power estimator, forwarding the detected signal and the CSI error parameter τ and noise power estimation to a decoder that estimates the transmitted symbol, wherein the estimation of the decoder produces a symbol that could probably have been transmitted it is forwarded to a de-mapper, which outputs the bit estimates corresponding to the estimated transmit signal and the corresponding estimated symbol to a microprocessor for further processing.

A translation device, a test system, and a memory system are provided. The translation device includes plural first input/output (I/O) circuits that respectively transmit and receive first signals through plural pins based on a pulse amplitude modulation (PAM)-M mode, a second I/O circuit that transmits and receives a second signal through one or more pins based on a PAM-N mode, and a translation circuit that translates the first signals into the second signal and translates the second signal into the first signals. M and N are different integers of 2 or more.

A translation device, a test system, and a memory system are provided. The translation device includes plural first input/output (I/O) circuits that respectively transmit and receive first signals through plural pins based on a pulse amplitude modulation (PAM)-M mode, a second I/O circuit that transmits and receives a second signal through one or more pins based on a PAM-N mode, and a translation circuit that translates the first signals into the second signal and translates the second signal into the first signals. M and N are different integers of 2 or more.

With increasingly dense wireless traffic in 5G and 6G networks, the incidence of message faults due to interference is increasing, leading to wasted time and energy on multiple re-transmissions. Disclosed are procedures for assembling a fault-free copy of a message from two corrupted copies. First, measure the modulation quality of each message element. A faulted message element usually has poor modulation quality. Then, select the best message elements from each of the two corrupted copies, and test the merged version against an embedded error-detection code. If the merged copy still fails the test, select each of the message elements that are different in the two faulted copies since they are all suspicious, and test each version with the error-detection code. By recovering a message despite reception errors, another transmission is avoided, saving time and energy, and avoiding contributing yet further to the background noise. Many additional aspects are disclosed.

With increasingly dense wireless traffic in 5G and 6G networks, the incidence of message faults due to interference is increasing, leading to wasted time and energy on multiple re-transmissions. Disclosed are procedures for assembling a fault-free copy of a message from two corrupted copies. First, measure the modulation quality of each message element. A faulted message element usually has poor modulation quality. Then, select the best message elements from each of the two corrupted copies, and test the merged version against an embedded error-detection code. If the merged copy still fails the test, select each of the message elements that are different in the two faulted copies since they are all suspicious, and test each version with the error-detection code. By recovering a message despite reception errors, another transmission is avoided, saving time and energy, and avoiding contributing yet further to the background noise. Many additional aspects are disclosed.

Disclosed are a method and device for detecting a standing-wave ratio, which are used for realizing quick and accurate detection of the standing-wave ratio by only using a downlink service signal transmitted by a TD-LTE base station system, thereby preventing a special training sequence from causing additional interference to the base station system. The method comprises: capturing output power detection data (OPD) of a service signal transmitted by the base station system and reflection power detection data (RPD) of a device to be detected in a base station; within a first preset bandwidth range, respectively extracting feedback signals of the OPD and feedback signals of the RPD within a plurality of periods of time according to a preset data length; determining spectrum characteristics of the feedback signals of the OPD and spectrum characteristics of the feedback signals of the RPD respectively corresponding to each period of time, and determining the reflection coefficient of the base station system according to the spectrum characteristics of the feedback signals of the OPD and the spectrum characteristics of the feedback signals of the RPD respectively corresponding to each period of time; and determining the standing-wave ratio of the base station system within the first preset bandwidth range according to the reflection coefficient of the base station system.

Disclosed are a method and device for detecting a standing-wave ratio, which are used for realizing quick and accurate detection of the standing-wave ratio by only using a downlink service signal transmitted by a TD-LTE base station system, thereby preventing a special training sequence from causing additional interference to the base station system. The method comprises: capturing output power detection data (OPD) of a service signal transmitted by the base station system and reflection power detection data (RPD) of a device to be detected in a base station; within a first preset bandwidth range, respectively extracting feedback signals of the OPD and feedback signals of the RPD within a plurality of periods of time according to a preset data length; determining spectrum characteristics of the feedback signals of the OPD and spectrum characteristics of the feedback signals of the RPD respectively corresponding to each period of time, and determining the reflection coefficient of the base station system according to the spectrum characteristics of the feedback signals of the OPD and the spectrum characteristics of the feedback signals of the RPD respectively corresponding to each period of time; and determining the standing-wave ratio of the base station system within the first preset bandwidth range according to the reflection coefficient of the base station system.