Measurements of Building Transmission Loss and Delay Spread at 2.5 GHz

Table 2

Effective attenuation constant for different types of buildings.

Buildings	Type of external walls	Building thickness (m)	Average transmission loss (dB)	Average value of (dB/m)	Standard deviation of (dB/m)
Residential buildings Type A
Building 3	Bricks and glass windows	56.46	46	1.16	0.22
Building 5	Bricks and glass windows	32.30	29	1.06	0.15
Residential buildings Type B
Building 4	Brick walls coated with ceramic, balconies, doors, and glass windows	68.64	35	1.88	0.24
Building 6	Brick walls coated with ceramic, balconies, doors, and glass windows	46.93	31	1.46	0.22
University gymnasium
Building 2	Reinforced concrete walls and brick and cast walls for ventilation	45.51	37	1.17	0.10
Office buildings
Building 1	Bricks, windows, and wooden doors	61.54	21	2.71	0.28
Building 9	Bricks and wood windows	25.44	13	1.80	0.40
Research laboratory
Building 7	Bricks and glass windows	39.04	37	0.95	0.20
Building 8	Bricks and glass windows	30.66	28	0.98	0.26
Building 10	Bricks and glass windows	29.86	20	1.30	0.41