GPS in Hong Kong

Recently, I had a chat with friends and professionals about GPS in Hong Kong. In recent years, there are two breakthroughs in GPS chips, one is the sensitivity has been improved much meaning signal reception have been improved in poor signal area. In other words, for areas that cannot recieve signal in the past, you can get position now. Second breakthrough is the cool start up time. We have Quick Fix II now, depending on the environment, it could provide fix within 4 seconds now. In the past, you need to wait for 20 to 60 seconds.

However, the final problem is building canyon, which I can see it could be fixed in while nobody will make it as a product in coming five years. This is the major problem of applying GPS in Hong Kong. Technically, it is due to a phenomenon called multiple path. Solving multiple path problem could be a good topic in the university. I guess, there is no simple answer. Even if there is answer, it will be very costly. This also means the very unique GPS problem in Hong Kong cannot be solved in short time. GPS applications including tracking or car navigation system could not become population in coming future.

However, if there is auxillary position system could be developed, then we don't need to wait researchers to solve the multi-path problem.