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2. Spread spectrum - Wikipedia

   en.wikipedia.org/wiki/Spread_spectrum

   Moreover, for a given noise power spectral density (PSD), spread-spectrum systems require the same amount of energy per bit before spreading as narrowband systems and therefore the same amount of power if the bitrate before spreading is the same, but since the signal power is spread over a large bandwidth, the signal PSD is much lower — often ...

3. Puzzle solutions for Tuesday, Sept. 17

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   Find answers to the latest online sudoku and crossword puzzles that were published in USA TODAY Network's local newspapers.

4. Frequency-hopping spread spectrum - Wikipedia

   en.wikipedia.org/wiki/Frequency-hopping_spread...

   In the US, FCC part 15 on unlicensed spread spectrum systems in the 902–928 MHz and 2.4 GHz bands permits more power than is allowed for non-spread-spectrum systems. Both FHSS and direct-sequence spread-spectrum (DSSS) systems can transmit at 1 watt, a thousandfold increase from the 1 milliwatt limit on non-spread-spectrum systems.

5. Direct-sequence spread spectrum - Wikipedia

   en.wikipedia.org/.../Direct-sequence_spread_spectrum

   Direct-sequence spread-spectrum transmissions multiply the symbol sequence being transmitted with a spreading sequence that has a higher rate than the original message rate. Usually, sequences are chosen such that the resulting spectrum is spectrally white. Knowledge of the same sequence is used to reconstruct the original data at the receiving ...

6. Puzzle solutions for Thursday, Nov. 14, 2024

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   SUDOKU. Play the USA TODAY Sudoku Game.. JUMBLE. Jumbles: VINYL GULCH RADISH OPAQUE. Answer: The pharaoh commissioned an artist to decorate his tomb. The result was — “HIRE-O-GLYPHICS”

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8. Code-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Code-division_multiple_access

   CDMA is a spread-spectrum multiple-access technique. A spread-spectrum technique spreads the bandwidth of the data uniformly for the same transmitted power. A spreading code is a pseudo-random code in the time domain that has a narrow ambiguity function in the frequency domain, unlike other narrow pulse codes. In CDMA a locally generated code ...

9. Channel access method - Wikipedia

   en.wikipedia.org/wiki/Channel_access_method

   Code-division multiple access and spread spectrum multiple access [ edit ] The code-division multiple access (CDMA) scheme is based on spread spectrum , meaning that a wider radio channel bandwidth is used than the data rate of individual bit streams requires, and several message signals are transferred simultaneously over the same carrier ...