Xg Technology, Inc.

Nadeem Khan

Joseph A Bobier

Jorge L Gil

William Pistole, Iii

Michael Greer

A MIMO antenna used in both transmit and receive operations, with the ability to serve an n-by-n MIMO transceiver architecture (where n can take integer values between 0 to 4). The structure is designed to increase the effective area of the array by coupling the bars of the antenna to the disc and results in good isolation and low envelope correlation.

MIMO antenna design used in fading environments

A Radio Frequency (RF) splitter/combiner technique for splitting and combining RF signals using a combination of microstrip traces and coaxial cable for an N-port network is disclosed.

Low loss RF transceiver combiner

A system and method of carrier less modulation is described in this disclosure that uses SAW filters as a modulator in addition to their conventional use as filters for band limiting an UWB system. This system and method is primarily designed to be used with any integer cycle, ultra-wide band or impulse type modulation and more particularly is designed to work with a method of modulation named xMax. This technique exploits the impulse response of the SAW filter producing a carrier less impulse radio system with limited bandwidth, low average power, but high peak power.

Carrier less modulator using saw filters

A system and method of damping the ringing response of Band Pass Filters for use in impulse and single cycle modulation systems which are capable of carrying a high data rate and which are severely affected by the ringing response of the Band Pass Filter.

System and method for wave damping

A system and method of carrier-less modulation is described in this disclosure that uses SAW filters as a modulator in addition to their conventional use as filters for band limiting an UWB system. This system and method is primarily designed to be used with any integer cycle, ultra-wide band or impulse type modulation and more particularly is designed to work with a method of modulation named xG Flash Signaling. This technique exploits the impulse response of the SAW filter by exciting the filter with a narrow pulse train producing a carrier-less impulse radio system with limited bandwidth, low average power, but high peak power.

Pulse train carrier-less modulator using SAW filters

A system and method to transport high bit-rate data over wired or wireless communication systems using specially modulated radio frequency carrier waves using an integer cycle or impulse modulation detection method where the signal to be demodulated is generally split, delayed, inverted and summed. When such integer cycle or impulse modulation modulated signals are passed through the system, the delayed signal is not the inverse of the non-delayed signal when there is data present. The resultant summed signal does not cancel completely, thus, resulting in a demodulated signal that is present only as long as the data is present in the integer or impulse modulated signal. This nulling effect also results in reducing the interference from other signals thereby improving the signal to noise ratio of the system. Thus the system not only reduces the interference from other channels, but it is a very fast demodulator that has the capability of demodulating the signal on an integer cycle basis.

Integer cycle event detection using wavelet pass filter system and method

The invention disclosed in this application discloses a method for modulating and demodulating compressed binary information that was derived from a binary information stream composed of a binary data sequence of first and second binary states that was modulated onto a carrier which has a waveform with a continuous sequence of wavelets with similar amplitudes defined by a 360 degree cycle between crossover positions representing a substantially zero energy level in which the carrier has been modulated in accordance with said binary data sequence by grouping said wavelets into wavelet groups containing two or more wavelets, receiving said information stream as a binary data sequence of first and second binary states; grouping said binary data sequence of first and second binary states into binary groups of two or more first and second binary states; correlating one of each said wavelets in said wavelet group with one of each possible binary values of each said binary groups, modulating said carrier in accordance with said binary data sequence by altering the amplitude or frequency of the one of each said wavelets in said wavelet groups corresponding to one of each said binary values of said binary groups resulting in a compressed binary modulated carrier, demodulating said compressed binary modulated carrier by detecting the respective amplitudes or frequencies of said wavelets to identify said altered wavelets in said wavelet groups and correlating to said binary values of said binary groups, and reconstructing said binary data sequence from said binary groups resulting in regeneration of said information stream.

Modulation compression method for the radio frequency transmission of high speed data

A sinusoidal RF carrier is modulated for the transmission of digital binary data streams through the amplitude suppression of carrier wavelets. These wavelets are defined between zero crossover positions representing zero energy locations. This modulation is accomplished when the carrier is slightly amplitude modulated with a modulation signal that is equal in frequency to the carrier itself and the modulation always begins or ends upon the exact zero voltage crossing point of the RF cycle phase. The modulation is applied as a slight shift of the amplitude of any single cycle, each cycle representing a single bit of data. A single cycle of RF will either represent a '1' or '0' depending upon the amplitude of the cycle, relative to other adjacent cycles in the same carrier.

Suppressed cycle based carrier modulation using amplitude modulation

The present invention is addressed to a method of modulation wherein digital data streams are radio transmitted at a high level of efficiency and speed, and without a large continuous concomitant formation of side frequency phenomena. Thus, bandwidths assigned for this transmissional task are quite narrow, with data transmission speeds at the singular frequency of the RF carrier itself. This invention can send high-speed data in RF channels that are very narrow and that would ordinarily be considered useful only for very low speed data or analog voice. The purpose of this invention is to provide a means by which a radio frequency carrier, expressed, as a square wave can be amplitude modulated with maximum efficiency and speed with minimum phase delay and distortion. RF filtering is used to reduce the modulated square wave to its base band sine wave component after modulation. This circuit may be used to modulate the carrier (clock) at any frequency up to and beyond the carrier frequency itself. This is useful in the implementation of broadband wireless systems. This invention can also be used with multiple access systems.

Growing community of inventors

Sunrise, FL, United States of America

Nadeem Khan