The goal of this homework is to prepare you for the midterm exam. The questions
will not be graded. Solutions will be posted on 10/11.

1. Suppose several nodes share a common physical medium by using CDMA with
   with 8-bit chip sequences. The receiver hears the following signal on the
   shared medium:

   Time slot 0: (-1, 3, 1, 3, -1, 3, 1, 3)
   Time slot 1: (-3, 1, 3, 1, -3, 1, 3, 1)

   The receiver wants to filter the data bits transmitted by a sender which have
   the chip sequence (1, 1, -1, 1, 1, 1, -1, 1). What are the data bits filtered
   by the receiver? Show all work.


2. How does Ethernet adapt to changes in the network load?

3. What are the problems with CSMA/CD in IEEE 802.11 wireless networks?

4. Explain how GSM solves the roaming problem.

5. What are the main steps in Bluetooth Piconet formation?