L band

About: L band is a research topic. Over the lifetime, 674 publications have been published within this topic receiving 4570 citations.

Satellite multi-media data receiver for computer

Abstract: The utility model relates to a satellite multi-media data receiver for a computer, which comprises a radio frequency head, a demodulation and channel processing module, a frame synchronization and address detection module, a data buffer storage module, a PCI bus interface and a power supply module. The utility model has the advantages that the lowest receiving rate is the symbol rate of 1M per second; the satellite multi-media data receiver for a computer effectively insulates interference; the satellite multi-media data receiver can receive MPEG-2 code stream which conforms to the standard of DVB-S; the frequency range of input signals is 950 to 2150 MHz on an L band, the level of the input signals in-25dBm to-65dBm, and an input interface is an F type joint; a PCI bus can be used when is plugged.

Low-cost high reliability digital satellite electronic tuner

Abstract: The utility model relates to a digital satellite electronic tuner with low cost and high reliability. A down frequency conversion of I/Q signal in L band is realized by passing a filter, an amplifier, an attenuator, a frequency conversion circuit, corresponding filters, and a local oscillating auxiliary circuits. The utility model comprises a filter, a two-stage high frequency amplifying and attenuating device 1, a lower frequency converter 2 that directly convert L band signals into analog base band I/Q signals, a QPSK demodulator and FEC that processes the output TS flow after receiving the analog base band I/Q signals from the down-frequency converter 2 and passing the double-tuning filter 2. Compared with prior art, the utility model greatly reduces the cost of tuners while improving the performance and reliability of the product.