One of the best kept secrets of the Japanese economic miracle after World War II, and particularly its rise to becoming the world's leader in steel sales, has been the intracacies of its aggressive international procurement and logistics strategy. That any nation essentially devoid of raw materials could organize the logistics of acquiring bulky, heavy inputs from locations 5,000-15,000 miles from its domestic factories, and then be able to sell finished products to distant resource-rich industrialized nations at prices significantly below those of local manufacture, stretches the imagination. This accomplishment also refutes the traditional economic laws of comparative advantage. This article makes clear the elements of the long-term Japanese materials management strategy that were an essential precondition for efficiently manufacturing steel and have been the vehicle for repeated successes in many other industries.
This paper proposes the real time implementation of CDMA, a multiple access technique, which brings forth the complete bandwidth usage by spreading the data of same transmitted power, over the whole bandwidth thereby ensuring safe communication and preventing the occurrence of jamming. GNU Radio is a software defined radio which puts experiments into practice using software rather than the normal hardware implementation. Blocks for data spreading, code despreading with and without code tracking are created using Zero Correlation Zone code (ZCZ, a combination of ternary codes that is 1, 0 and -1 which is specified in the program). Thus the real time implementation of CDMA checks the feasibility of an asynchronous multiuser communication among users with good results.
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