# A serial bit stream, proceeding at a rate of 10 kbps from a source, is given as

## Question:

110110 010111 011011 (spacing for clarity)

Number the bits from left to right starting with 1 and going through 18 for the right-most bit. Associate the odd indexed bits with d_{1} (t) and the even-indexed bits with d_{2} (t) in Figure 10.1.

(a) What is the symbol rate for d_{1} or d_{2}?

(b) What are the successive values of Î¸_{i} given by (10.2) assuming QPSK modulation? At what time intervals may Î¸_{i} switch?

(c) What are the successive values of Î¸_{i} given by (10.2) assuming OQPSK modulation? At what time intervals may Î¸_{i} switch value?

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**Related Book For**

## Principles of Communications Systems, Modulation and Noise

**ISBN:** 978-8126556793

7th edition

**Authors:** Rodger E. Ziemer, William H. Tranter