Abstract: In a portable radio transceiver, such as a mobile wireless telephone, conditions indicative of transmitter distortion (as represented by error vector magnitude (EVM)) are sensed, and transmitted RF power is adjusted in response, so as to reduce distortion and decrease EVM. The conditions can include high VSWR or a combination of high VSWR and low battery power.

Abstract: The present invention discloses a method and an apparatus for reactivating lime-based sorbents and increasing the carbon dioxide-capture capacity of the sorbent in the combustion of carbon-containing fuels. The method of the present invention seeks to increase the carbon dioxide capture capacity of lime-based sorbents by applying concentrated or 100% carbon dioxide directly to a lime-based sorbent. Optionally, the lime-based sorbent may be pretreated using a hydration process after each process of carbon dioxide separation. The regenerated sorbent is carbonated in a presence of concentrated carbon dioxide and elevated temperatures. The invention is useful in reducing the need to add additional sorbent to maintain the carbonation/calcination cycle. The regenerative potential of the sorbent as manifested by the present invention leads to increased carbon dioxide-capture capacity of the sorbent.

Abstract: In a portable radio transceiver, such as a mobile wireless telephone, conditions indicative of transmitter distortion (as represented by error vector magnitude (EVM)) are sensed, and transmitted RF power is adjusted in response, so as to reduce distortion and decrease EVM. The conditions can include high VSWR or a combination of high VSWR and low battery power.

Abstract: A magnitude of radio frequency voltage and current, input into a load from a radio frequency power source, are measured at a single point along a transmission line. Phase difference between voltage and current is also measured. These measurements are used to compute VSWR and forward input power. The computed measurements may be compared against predetermined VSWR limits, and operation of the radio frequency power source can be adjusted to prevent damage to the detection apparatus or load.

Abstract: An alternative process whereby the calcium sulphide formed in an IGCC system from calcium oxide and/or calcium carbonate can be safely and more or less quantitatively converted by reaction with carbon dioxide to calcium carbonate and/or calcium oxide together with sulphur dioxide. The calcium oxide and/or calcium carbonate can be reused in the IGCC system, and the sulphur dioxide can be converted to a useful product, such as sulphuric acid. One result of this process is that since the furnace ashes do not contain a significant level of calcium sulphide, they can be safely disposed of in a land fill site.

Abstract: A process for hydrating CaO residues in fluidized bed combustor ashes that achieves a better level of hydration, which does not add significantly to the cost of the hydration process, which reduces the consumption of water in the hydration process, and which if desired can trap at least some of the CO2 in the furnace gasses, by using some of it to convert the hydrated CaO to CaCO3. This both reduces the amount of CO2 released to the atmosphere, and converts the potentially dangerous CaO in the ashes into an effectively inert and benign material. By exposing the ash/water mixture to sound under the correct conditions of frequency, and power input, it is possible to improve both the rate of hydration, and the level of hydration, of FBC ashes. The process can be carried out either batchwise or continuously, and does not require an extended time period.

Abstract: A two-way paging system includes one or more transmitters, a plurality of receivers, and at least one two-way personal paging unit or pager. The two-way pager receives pages from the transmitter, and sends response signals which are detected by the receivers. The response signals are in the form of digital packets, including forward error correction encoding and digital symbols that each consists of a predetermined number of bits. The receivers detecting the response signals decode the response packets to verify their accuracy and to identify the digital symbols. At the receivers, "accuracy indicators" can be associated with the detected symbols, providing an indication of the probability of accuracy. In one embodiment ("microdiversity receiver") two receiver components are provided at a single receiver site, with a separate antenna for each receiver component.

Abstract: A two-way paging system includes one or more transmitters, a plurality of receivers, and at least one two-way personal paging unit or pager. The two-way pager receives pages from the transmitter, and sends response signals which are detected by the receivers. The response signals are in the form of digital packets, including forward error correction encoding and digital symbols that each consists of a predetermined number of bits. The receivers detecting the response signals decode the response packets to verify their accuracy and to identify the digital symbols. At the receivers, "accuracy indicators" can be associated with the detected symbols, providing an indication of the probability of accuracy. In one embodiment ("microdiversity receiver") two receiver components are provided at a single receiver site, with a separate antenna for each receiver component.

Abstract: A two-way paging system (10) includes a plurality of personal paging units (16). The personal paging units (16) receive pages (18), and generate radio signals (28) in response to the pages. The system includes a transmitter (12) for generating the pages, and a receiver (14). The receiver includes first and second receiving circuitry (30) and (34). The first receiving circuitry receives radio signals from the personal paging units. The second receiving circuitry receives radio signals from a source other than the personal paging units. The receiver further includes a data processor (32) electronically linked with the first and second receiving circuitry in the receiver. The data processor determines the time period during which radio signals are received from the personal paging units by the first receiving circuitry, based on radio signals received from the other source by the second receiving circuitry. In a preferred embodiment, the second receiving circuitry receives radio signals from the transmitter.