A radio frequency (RF) receiver includes a transceiver, a programmable logic device (PLD), and a digitally tunable high-pass and low-pass filter bank. The transceiver is configured to receive a mission data file (MDF) specifying a plurality of RF frequencies to be tuned by the receiver and to convert the MDF into a binary file. The PLD is configured to receive the binary file from the transceiver and, based on the binary file, to transmit one or more commands that cause the filter bank to enter a selected one of a plurality of predefined filter states corresponding to one or more of the RF frequencies. In operation, the receiver receives an input signal and the filter bank dynamically filters the input signal in response to the one or more commands from the PLD.

A radio frequency (RF) receiver includes a transceiver, a programmable logic device (PLD), and a digitally tunable high-pass and low-pass filter bank. The transceiver is configured to receive a mission data file (MDF) specifying a plurality of RF frequencies to be tuned by the receiver and to convert the MDF into a binary file. The PLD is configured to receive the binary file from the transceiver and, based on the binary file, to transmit one or more commands that cause the filter bank to enter a selected one of a plurality of predefined filter states corresponding to one or more of the RF frequencies. In operation, the receiver receives an input signal and the filter bank dynamically filters the input signal in response to the one or more commands from the PLD.

A multipath suppression method based on a steepest descent method includes stripping, according to carrier Doppler shift information fed back by a phase-locked loop, a carrier from an intermediate-frequency signal input into a tracking loop; constructing, on the basis of the autocorrelation characteristics of a ranging code, a quadratic cost function related to a measurement deviation of the ranging code, the cost function being not affected by a multipath signal; and finally, designing a new tracking loop of the ranging code according to the quadratic cost function and the principle of the steepest descent method, such that the loop has a multipath suppression function without increasing the computational burden. Compared with a narrow-distance correlation method, the current method reduces computing resources by ⅓, the design and adjustment of parameters are simple and feasible, a multipath suppression effect is superior, and a high engineering application value is obtained.

The present disclosure provides a receiver circuit and a receiver circuit control method. In the present disclosure, the input data is detected by a detection circuit to obtain a data rate detection result, and the bandwidth of the receiver is automatically adjusted according to the data rate detection result.

The present disclosure provides a receiver circuit and a receiver circuit control method. In the present disclosure, the input data is detected by a detection circuit to obtain a data rate detection result, and the bandwidth of the receiver is automatically adjusted according to the data rate detection result.

An antenna system for use with one or more media devices is provided. The antenna system includes a plurality of antenna elements. Each antenna element is associated with an independent feed element. In addition each antenna element is configured to receive a plurality of radio frequency (RF) signals. Each RF signal can be associated with a UHF band or a VHF band. The antenna system can include at least one tuner and at least one switching device. The at least one switching device can be configured to selectively couple the at least one tuner to one antenna element of the plurality of antenna elements based, at least in part, on channel selection data associated with the at least one tuner.

An antenna system for use with one or more media devices is provided. The antenna system includes a plurality of antenna elements. Each antenna element is associated with an independent feed element. In addition each antenna element is configured to receive a plurality of radio frequency (RF) signals. Each RF signal can be associated with a UHF band or a VHF band. The antenna system can include at least one tuner and at least one switching device. The at least one switching device can be configured to selectively couple the at least one tuner to one antenna element of the plurality of antenna elements based, at least in part, on channel selection data associated with the at least one tuner.

An antenna system includes: a radiating element; a feed coupled to the radiating element at a first point on the radiating element and configured to convey energy to the radiating element; and a radiation-adjustment device coupled to the radiating element at a second point, configured to alter a radiation characteristic of the radiating element, and including: coarse-adjustment elements; an integrated-circuit chip including: switches, each coupled to a respective one of the coarse-adjustment elements where the coarse-adjustment elements are disposed external to the integrated-circuit chip; and a fine-adjustment circuit; the antenna system further including a controller communicatively coupled to the switches and to the fine-adjustment circuit, the controller configured to alter the radiation characteristic of the radiating element by selectively causing one or more of the switches to couple one or more of the coarse-adjustment elements to the radiating element, and by adjusting a value of the fine-adjustment circuit.

An antenna system includes: a radiating element; a feed coupled to the radiating element at a first point on the radiating element and configured to convey energy to the radiating element; and a radiation-adjustment device coupled to the radiating element at a second point, configured to alter a radiation characteristic of the radiating element, and including: coarse-adjustment elements; an integrated-circuit chip including: switches, each coupled to a respective one of the coarse-adjustment elements where the coarse-adjustment elements are disposed external to the integrated-circuit chip; and a fine-adjustment circuit; the antenna system further including a controller communicatively coupled to the switches and to the fine-adjustment circuit, the controller configured to alter the radiation characteristic of the radiating element by selectively causing one or more of the switches to couple one or more of the coarse-adjustment elements to the radiating element, and by adjusting a value of the fine-adjustment circuit.

Circuits for a receiver, comprising: M first mixers that each receive an input signal, that are each clocked by a different phase of a first common clock frequency, and that each provide an output, wherein M is a count of the first mixers; and M sets of N second mixers, wherein N is a count of the second mixers in each of the M sets, wherein each second mixer in each set of N second mixers receives as an input the output of a corresponding one of the M first mixers, wherein each of the N second mixers in each of the M sets are clocked by a different phase of a second common clock frequency, and wherein each of the second mixers has an output.