Consider the Direct Sequence Spread Spectrum (DSSS) technique. Suppose that User 1 wants to transmit the following binary sequence

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Q1: Consider the Direct Sequence Spread Spectrum (DSSS) technique. Suppose that User 1 wants to transmit the following binary sequence (data stream d(t)) 11010011 to User 2. Both users agreed to use the following PN sequence 1010 (a.k.a chip sequence).

Show how the transmitted signal 𝒔(𝒕) will look like using two different techniques;

• multiplying the data stream 𝒅(𝒕) and 𝒄(𝒕) together and then performing the BPSK modulation, where 𝒄(𝒕) is the PN sequence taking on values of +𝟏 and −𝟏).

• performing the BPSK modulation on the data stream 𝒅(𝒕) to generate the modulated signal (data signal) 𝒔_𝒅(𝒕) and then multiplying by 𝒄(𝒕).

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