ParkerVision introduces a "green transmitter" technology for RF modem applications.
ParkerVision integrates the transmitter and power amplifier functions into a single unified system that is configured to achieve the highest efficiency on the market. Control signals are created from baseband data, enabling ParkerVision's nonlinear transmitter technology to create accurate, complex RF waveforms at the desired output level without additional amplification. The agile technology supports all modulated waveforms for any standard, including GSM, EDGE, CDMA, WCDMA, HSUPA, LTE, or TD-SCDMA. The system operates the entire transmit chain in the most efficient state on an instantaneous basis. Handset designers no longer must choose between performance and battery life, while benefiting from reduced heat and enhanced reliability.
ParkerVision pioneered direct-conversion RF receiver technologies using energy-sampling technologies.
At one time, super-heterodyne technology was the mainstay for handset receivers. High performance was achieved through multiple down-conversion steps using conventional mixers that required high L.O. power levels for the desired sensitivity and linearity. This approach was impractical for low-power-CMOS applications, then, and for the highly integrated, deep submicron CMOS transceivers and SoCs, which are found in todays wireless devices.
ParkerVision created a fundamental shift in RF signal processing. Using RF energy sampling technologies, it was first to develop a practical, matched-filter correlator for frequency down-conversion. The technologies provide the highest sensitivity, bandwidth and dynamic range that are available for direct-conversion receivers, in addition to benefits in selectivity and rejection of interference. These benefits are enhanced by eliminating RF signal division between I and Q paths, which result in lower power consumption and better demodulation accuracy.
Better still, the technology has been proven to be compact and cost effective in CMOS technology. The technology enables multimode receivers to be implemented in ever-decreasing CMOS geometries and voltage levels, while facilitating ever-increasing levels of functional integration. By reducing redundancy, silicon area shrinks. By improving dynamic range, fewer resonant structures and external SAW or BAW filters are required. Now, the technology is being applied to a wide range of applications, including handsets, embedded modems, and tablets, that must accommodate various combinations of GSM, EDGE, CDMA, UMTS, TD-CDMA, and LTE standards.