A potential disadvantage of MIMO is its complexity, particularly the broadband time-domain version of MIMO. In the presence of delay-spread, a MIMO receiver (space-time equalizer) is quite complex. The Solution is MIMO OFDM which simplifies the implementation of MIMO without loss of capacity, avoids inter-symbol-interference by modulating narrow orthogonal carriers, and each narrowband carrier is treated as a separate MIMO system with zero delay-spread.

To increase the data transmission, a combination of both modulation and multiplexing in MIMO is required. Unlike general multiplexing technique it is applied to only one independent channel, where a set of signals from the same source is divided or spitted into a number of independent channels (sub-set of the main signals) and each modulated by separate carrier, and then multiplexed into an OFDM signal for transmission. Each independent sub-set channel can be multiplexed either by frequency or code division multiplexing. The characteristics of OFDM sub-channels depict the orthogonality of the subcarries, where each sub-channel of the main signal in fact multiplied by a carrier which is orthogonal to each other. Carriers are nothing but sine or cosine wave; and the area under one sine and one cosine wave is simply zero.

Representative APR 391%

Let's say you want to borrow $100 for two week. Lender can charge you $15 for borrowing $100 for two weeks. You will need to return $115 to the lender at the end of 2 weeks. The cost of the $100 loan is a $15 finance charge and an annual percentage rate of 391 percent. If you decide to roll over the loan for another two weeks, lender can charge you another $15. If you roll-over the loan three times, the finance charge would climb to $60 to borrow the $100.

Implications of Non-payment: Some lenders in our network may automatically roll over your existing loan for another two weeks if you don't pay back the loan on time. Fees for renewing the loan range from lender to lender. Most of the time these fees equal the fees you paid to get the initial payday loan. We ask lenders in our network to follow legal and ethical collection practices set by industry associations and government agencies. Non-payment of a payday loan might negatively effect your credit history.

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