Signal transmitting method, transmitting apparatus, and receiving apparatus used for the signal transmitting method
AssigneeFujitsu Limited
InventorHideki Yoshizawa
Life of this patent
Estimating the term…
Abstract
A disclosed signal transmitting method includes the steps of a) categorizing plural digital signals, obtained by performing A/D conversion on plural analog signals consecutively arranged in a time direction, into plural signal groups in an order starting from lower bits of the plural digital signals, b) performing code spreading on the plural digital signals by using a different spread frequency for each signal group and using different spread codes for each bit, c) multiplexing the spread digital signals, and d) transmitting the multiplexed plural digital signals.
Claims12
A signal transmitting method comprising:
- a) categorizing a plurality of digital signals, obtained by performing A/D conversion on a plurality of analog signals consecutively arranged in a time direction, into a plurality of signal groups in an order starting from lower bits of the plural digital signals;
- b) performing code spreading on the plural digital signals by using a different spread frequency for each signal group and using different spread codes for each consecutive bit of each signal group;
- c) multiplexing the spread digital signals;
- and
- d) transmitting the multiplexed plural digital signals.
A transmitting apparatus comprising:
- an A/D converting part configured to perform A/D conversion on a plurality of analog signals consecutively arranged in a time direction;
- a code spreader configured to categorize the plural digital signals into a plurality of signal groups in an order starting from lower bits of the plural digital signals and perform code spreading on the plural digital signals by using a different spread frequency for each signal group and using different spread codes for each consecutive bit of each signal group;
- and
- a multiplexer configured to multiplex the spread plural digital signals of each signal group and transmit the multiplexed plural digital signals.
A receiving apparatus for receiving a plurality of multiplexed digital signals, the multiplexed plural digital signals being obtained by categorizing a plurality of digital signals, obtained by performing A/D conversion on a plurality of analog signals consecutively arranged in a time direction, into a plurality of signal groups in an order starting from lower bits of the plural digital signals, performing code spreading on the plural digital signals by using a different spread frequency for each signal group and using different spread codes for each consecutive bit of each signal group, and multiplexing the spread digital signals, the receiving apparatus comprising:
- a despreader configured to despread the multiplexed plural digital signals for each bit by using different spread codes;
- and
- a separating part configured to separate the plural digital signals from the despread multiplexed plural digital signals.
Dependencies are inferred from the claim text.