摘要:
A method for adaptive digital post distortion reduction is described. An analog radio frequency (RF) signal is received. The frequency of the analog RF signal is downconverted using analog circuitry. The analog RF signal is converted to a digital signal using an analog to digital converter (ADC). Digital post distortion reduction is applied to the digital signal to reduce nonlinearities in the digital signal.
摘要:
Certain embodiments of the disclosure propose a method for cancelling co-channel interference (self-jamming) generated by nonlinearities in the radio-frequency (RF) front-end devices. The proposed method utilizes an adaptive non-linear filter to generate a distorted version of the transmitted signal. The self-jamming interference may be mitigated utilizing the distorted signal through adaptive cancellation.
摘要:
Certain embodiments of the disclosure propose a method for cancelling co-channel interference (self-jamming) generated by nonlinearities in the radio-frequency (RF) front-end devices. The proposed method utilizes an adaptive non-linear filter to generate a distorted version of the transmitted signal. The self-jamming interference may be mitigated utilizing the distorted signal through adaptive cancellation.
摘要:
A method for adaptive digital post distortion reduction is described. An analog radio frequency (RF) signal is received. The frequency of the analog RF signal is downconverted using analog circuitry. The analog RF signal is converted to a digital signal using an analog to digital converter (ADC). Digital post distortion reduction is applied to the digital signal to reduce nonlinearities in the digital signal.
摘要:
An oscillator comprises an active device with a phase shift of less than 180 degrees. A first delay line has first and second ends. The first end of the first delay line is coupled to an active port of the active device. A ring mode trap filter is coupled to the second end of the first delay line. A second delay line has first and second ends. The first end of the second delay line is coupled to the ring mode trap filter. The second end of the second delay line is coupled to a resonance means. The total delay of the first and second delay lines allows the resonance means to oscillate at its natural frequency in spite of the less-than-180-degree phase shift of the active device.
摘要:
An improved method and apparatus for using parallel amplifiers to efficiently amplify an information signal are disclosed. The improved apparatus utilizes digital signal manipulation techniques in optimizing the phase of the upconverted input signals provided to each of the parallel amplifiers. The phase and amplitude of the input signals are adjusted such that the power measured at the output of a combiner is maximized as compared to the sum of the power of combiner input signals.
摘要:
A base station and receiver system for use in a base station which achieves enhanced dependability by logically separating the diversity reception paths into different failure paths. In one embodiment, the receiver system includes a first diversity reception path for receiving a first radio signal and a second diversity reception path for receiving a second radio signal. The first and second radio signals may be amplitude and phase shifted versions of the same information signal according to well known principles of diversity reception. At least one demodulator diversity combines the first and second radio signals and demodulates the diversity combined first and second radio signals. Additionally, the first and second diversity paths are logically separated into different failure paths.
摘要:
Biological inspection procedures and surface sanitization procedures are incorporated with a garment providing service to look for and monitor the presence of microbes, such as bacteria in particular, and to eliminate such microbes within the garment service. Biological inspection procedures can be conducted on the garments themselves, or any surface of the garment facility, such as a surface onto which the garments may come into contact after laundering. Preferably, a washing procedure is conducted based upon a cleaning formulation to also minimize the presence of microbes. Garments are preferably inspected after they are laundered and ready for delivery to the customer. Facility surfaces, such as sorting and/or folding tables that may be utilized after laundering, are sanitized and then may be tested in accordance with the present invention to minimize the potential for contamination of garments from such surfaces. Optionally, the equipment that is used after laundering for such activities can be dedicated for processing garments in accordance with the biological inspection service as such garments are to be delivered to a customer, such as a processor within the food industry.
摘要:
An improved baby mattress is formed of four sections, with a two part central section including a pair of interactive cradles which provide safe and comfortable support for a sleeping infant. An upper life cradle area may be variably pressurized to produce a telescoping well which encourages placing the infant for safe sleeping on its back. A lower safety cradle is filled with strong and resilient foam rubber and serves to safely support the infant in the event of unwanted cradle deflation. An array of auxiliary support and shape retaining members serve to give the crib-sized mattresses a stable and smooth overall rectangular appearance.
摘要:
Multiple streams from multiple circuit paths are Block-TDM (Block-Time-Division-Multiplexing) aggregated into a single stream that passes via a single path through processing circuitry capable of handling the aggregated signal. The cost of providing redundant processing circuitry is avoided. After processing in the single path, the resulting signal is Block-TDM de-aggregated to generate multiple streams. Each output stream is substantially the same as if its corresponding input stream had been processed in a separate path using separate processing circuitry. The path-sharing technique is usable to pass multiple streams from multiple radio receivers through one superior Delta-Sigma ADC (DSADC) as opposed to using multiple flat ADCs to process information from the multiple receivers. In one example, the DSADC can be used because the aggregation is Block-TDM-based and the de-aggregator involves a digital low pass filter. In another example, the de-aggregator involves a decoder and the aggregator involves a precoder.