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US 12,261,638 B2Granted
Wideband communication system and a method thereof
AssigneeElbit Systems C4I and Cyber Ltd.
InventorsEzra Zamir, Yizhack Yadgar, Shaul Baruch Laufer
Life of this patent
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Abstract
A wireless transmitting method comprising: obtaining a first-spread-spectrum-signal (SS1-signal); producing a doubly-spread-spectrum-signal (SS2-signal) from the SS1-signal utilizing a spreading-sequence out of at least one spreading-sequence; modulating the SS2-signal to a Radio-Frequency SS2-signal (RF-SS2-signal); and transmitting the RF-SS2-signal.
Claims19
A method for spreading of received signals, the method comprising:
- generating a first-spread-spectrum-signal (SS1-signal), wherein the SS1-signal is generated by performing a first spreading of a data signal, by a first spreader, wherein the frequency bandwidth (BW) of the SS1-signal is greater than the frequency BW of the data signal;
- converting the SS1-signal into an optical SS1-signal, using an optical second spreader;
- generating a doubly-spread-spectrum optical signal (optical SS2-signal) from the optical SS1-signal, using the optical second-spreader, wherein the frequency BW of the optical SS2-signal is greater than the frequency BW of the SS1-signal;
- and
- generating a corresponding RF signal (RSS2-signal) from the optical SS2-signal, wherein the frequency BW of the RSS2-signal is greater than the frequency BW of the SS1-signal,
- wherein the optical SS2-signal is generated by having the optical SS1-signal manipulated by the optical second spreader, using a spreading-sequence out of at least one spreading-sequence, and
- wherein the RSS2-signal is generated for transmitting of the RSS2-signal via a wireless communication network.
4 more elements
A method for de-spreading received signals, the method comprising:
- receiving a radio frequency (RF) doubly-spread-spectrum-signal (RSS2-signal) via a wireless communication link;
- de-spreading the RSS2-signal by using an optical second de-spreader, which is configured for converting the RSS2-signal into an optical RSS2-signal and producing an extracted-first-spread-spectrum-signal (ESS1-signal) wherein the frequency bandwidth (BW) of the RSS2-signal is greater than the frequency BW of the ESS1-signal;
- and
- producing a data signal from the ESS1-signal, wherein the frequency BW of the ESS1-signal is greater than the frequency BW of the data signal,
- wherein the ESS1-signal is generated by having the optical RSS2-signal manipulated by the optical second de-spreader, using a de-spreading sequence out of at least one de-spreading sequence;
- and
- wherein the data signal is within the RF spectral range.
4 more elements
A transmitter's cascaded spread-spectrum system, the system comprising:
- a first-spreader configured to spread a data-signal for generating a corresponding first-spread-spectrum-signal (SS1-signal), wherein the frequency bandwidth of the SS1-signal is greater than the frequency bandwidth of the data-signal;
- and
- an optical second-spreader that is configured for converting the SS1-signal into an optical SS1-signal and further spread the optical SS1-signal to an optical doubly spread spectrum signal (optical SS2-signal), wherein the frequency bandwidth of the optical SS2-signal is greater than the frequency bandwidth of the SS1-signal;
- and
- a frequency converter, configured to convert the optical SS2-signal into a radio frequency (RF) SS2 signal (RSS2-signal), wherein the frequency BW of the RSS2-signal is greater than the frequency BW of the SS1-signal, for transmitting of the RSS2-signal via a wireless communication network,
- wherein the optical SS2-signal is generated by having the optical SS1-signal manipulated by the optical second spreader using a spreading-sequence out of at least one spreading-sequence, and
- wherein the RSS2-signal is generated for transmitting of the RSS2-signal via a wireless communication network.
4 more elements
A receiver's cascaded spread-spectrum system, the system comprising:
- an optical second de-spreader configured to receive a radio frequency (RF) doubly spread spectrum signal (RSS2-signal), via a wireless communication link, and convert the received RSS2-Signal into an optical RSS2-signal and generate an extracted-spread-spectrum-signal (ESS1-signal), wherein the frequency bandwidth of the RSS2-signal is greater than the frequency bandwidth of the ESS1-signal;
- and
- a first de-spreader configured to further de-spread the ESS1-signal to a data-signal that is within the RF frequency range, wherein the frequency bandwidth of the ESS1-signal is greater than the frequency bandwidth of the data-signal
- wherein the ESS1-signal is generated by having the optical RSS2-signal manipulated by the optical second de-spreader, using a de-spreading sequence out of at least one de-spreading sequence.
1 more element
Dependencies are inferred from the claim text.