US 2002/0055335 A1 · Radio reception apparatus and high speed equalization processing method therefor

Abstract

The invention provides a radio reception apparatus by which a delay by initialization of an equalizer is minimized and an equalization process with a minimum preamble signal can be performed normally to assure a high transmission efficiency and suppress an increase of the power consumption. First and second RF sections convert the frequencies of reception data from first and second antennae. A comparison section compares reception sensitivities of outputs of the first and second RF sections to select the output having a higher reception sensitivity. First and second carrier detection sections detect a start of reception data based on an output signal of the comparison section and causes an equalization processing section to end its demodulation upon reception of a demodulation data end signal. A first OR circuit outputs a result of logical ORing of the outputs of the first and second carrier detection sections. A first AND circuit outputs the output of the first RF section while the output of the first carrier detection section is active. A second AND circuit outputs the output of the second RF section while the output of the second carrier detection section is active. A second OR circuit outputs a result of logical ORing of the outputs of the first and second AND circuits. The equalization processing section receives the reception data signal from the second OR circuit and performs equalization for the received reception data based on the output of the first OR circuit.

Claims9

Dependent claims

A radio reception apparatus, comprising:

first and second antennae for receiving data from a transmission side;
a first RF section for performing a frequency conversion process of the reception data from said first antenna;
a second RF section for performing a frequency conversion process of the reception data from said second antenna;
first and second carrier detection sections for discriminating presence/absence of a carrier based on RSSI signals from said first and second RF sections, respectively;
a comparison section for comparing reception levels of the RSSI signals from said first and second RF sections with each other to select that one of the RSSI signals which has a higher reception level and supplying a signal representative of the selected reception level to that one of said first and second carrier detection sections which corresponds to that one of said first and second RF sections from which the selected signal has been outputted;
an equalization processing section including an equalizer;
and
control means for supplying, based on carrier sense signals outputted from said first and second carrier detection sections, the reception data signal outputted from that one of said first and second RF sections which has a higher reception sensitivity to said equalization processing section and controlling said equalization processing section to operate based on the reception data signal.

5 more elements

A radio reception apparatus, comprising:

first and second antennae for receiving data from a transmission side;
a first RF section for performing a frequency conversion process of the reception data from said first antenna;
a second RF section for performing a frequency conversion process of the reception data from said second antenna;
a comparison section for comparing a reception sensitivity of an output signal of said first RF section and a reception sensitive of an output signal of said second RF section with each other to select that one of the output signals which has a higher reception sensitivity;
first and second carrier detection sections for outputting an output signal of an active state when a start of reception data is detected based on an output signal of said comparison section but rendering the output signal inactive when a demodulation data end signal is received;
a first OR circuit for logically ORing the output signal of said first carrier detection section and the output signal of said second carrier detection section and outputting a result of the logical ORing;
a first AND circuit for receiving the output signal of said first RF section and the output signal of said first carrier detection section and outputting the output signal of said first RF section within a period within which the output signal of said first carrier detection section is active;
a second AND circuit for receiving the output signal of said second RF section and the output signal of said second carrier detection section and outputting the output signal of said second RF section within a period within which the output signal of said second carrier detection section is active;
a second OR circuit for logically ORing the output signal of said first AND circuit and the output signal of said second AND circuit and outputting a result of the logical ORing;
and
an equalization processing section for receiving the reception data signal outputted from said second OR circuit and performing an equalization process for the received reception data based on the output signal of said first OR circuit.

8 more elements

Dependencies are inferred from the claim text.

Radio reception apparatus and high speed equalization processing method therefor

Life of this patent

Radio reception apparatus and high speed equalization processing method therefor

Life of this patent

Abstract

Claims9