摘要:
Some demonstrative embodiments include apparatuses, systems and/or methods of wireless communication via an antenna array. For example, an apparatus may include an antenna array including a plurality of antenna modules arranged along a first axis, an antenna module of the antenna modules including an antenna sub-array coupled to a Radio-Frequency (RF) chain, the antenna sub-array including a plurality of antenna elements arranged along a second axis, the second axis is perpendicular to the first axis, and the RF chain is to process RF signals communicated via the plurality of antenna elements.
摘要:
Some demonstrative embodiments include apparatuses, systems and/or methods of transmit power control for wireless communication. For example, an apparatus may include a controller to control a plurality of transmit powers of a plurality of directional beams formed by an antenna array to transmit a wireless communication. The controller may control the plurality of transmit powers based on at least first and second power limits, the first power limit including a power density limit corresponding to a power density of a directional beam of the plurality of directional beams, and the second power limit including a total transmit power limit corresponding to a total of the transmit powers.
摘要:
Briefly, in accordance with one embodiment of the invention, an orthogonal frequency division multiplexing system may provide a dynamically calculated cyclic extension, the length of which may be based at least in part on a delay spread due to an experienced environmental condition. The length of the cyclic extension may be calculated by determining a channel impulse response, and then computing the energy distribution of the channel impulse response. The length of the cyclic extension may then be set according to the energy distribution of the channel impulse response.
摘要:
Phase and amplitude offsets of a multicarrier transceiver may be reduced by measuring receiver amplitude and phase mismatches of receiver radio-frequency (RF) circuitry by performing a fast Fourier transform (FFT) on a receiver calibration signal.
摘要:
A multichip transceiver operates as part of a multiple-input multiple-output communication system. First receiver circuitry on a first integrated circuit processes radio-frequency (RF) signals received from a first signal source, and second receiver circuitry on a second integrated circuit processes RF signals received from a second signal source. Clock-signal generating circuitry provides clock signals through phase-matched paths to the first and second receiver circuitry.
摘要:
Briefly, in accordance with one embodiment of the invention, an orthogonal frequency division multiplexing system may provide a dynamically calculated cyclic extension, the length of which may be based at least in part on a delay spread due to an experienced environmental condition. The length of the cyclic extension may be calculated by determining a channel impulse response, and then computing the energy distribution of the channel impulse response. The length of the cyclic extension may then be set according to the energy distribution of the channel impulse response.
摘要:
Architectures including digital outphasing transmitters. Digital signal generation circuitry generates at least two base-band sinusoid signals. Bandpass modulation circuitry is coupled to receive the base-band sinusoid signals and generates at least two modulated digital signals. Power amplifiers are coupled to receive the modulated digital signals to amplify the modulated digital signals. The amplified modulated signals are combined and transmitted.
摘要:
Apparatus and methods are provided to allow multiple, possibly overlapping, regions of interest within a frequency spectrum to be defined, and managed. Each of these regions of interest may be selected for further testing or identification. Unselected regions are allowed to collapse into narrow bars so as not to interfere with the selected region. Multiple rows are provided to allow for the definition and selection of overlapping regions of interest. Furthermore, in some embodiments aid is provided for identifying the signal type by providing a list of signal type candidates based upon such parameters as region of interest bandwidth, region of interest center frequency and geographic location.
摘要:
Briefly, in accordance with one embodiment of the invention, an orthogonal frequency division multiplexing system may provide a dynamically calculated cyclic extension, the length of which may be based at least in part on a delay spread due to an experienced environmental condition. The length of the cyclic extension may be calculated by determining a channel impulse response, and then computing the energy distribution of the channel impulse response. The length of the cyclic extension may then be set according to the energy distribution of the channel impulse response.