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JPL's Wireless Communication Reference WebsiteChapter: Wireless Channels
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Room 550 produced the greatest delay spreads and likewise Room 550 was the largest room.
Cory Hall 550
The Figures below exhibit instantaneous impulse responses from measurements in Room 550. These two figures serve as examples of different respective arrival times for the first and the strongest received signal component arrival times. Measurements have been taken at a 35 foot received-transmit separation distance.
FIGURE: Impulse Response in Cory 550
FIGURE: Impulse Response in Cory 550
FIGURE: Pathloss
Given the proposed InfoPad downlink CDMA chip rate of several tens of Megachips per second, we arrive at 3 - 4 Resolvable Paths Room 550
FIGURE: Signal Penetration Through Walls
The instantaneous impulse response was taken on the 5th floor of Cory Hall. The transmitter was located in room 550 and the receiver was located in the corridor near the freight elevator. The received powers shown are with respect to +10 dBm so that absolute values can be obtained by adding 10 to magnitudes shown. Clearly the received signal strength through the wall is significant and shows that some of the walls in Cory Hall can not serve as cell boundaries. Note that certain walls in Cory consist of different materials than those on the 5th floor.
